
Geometry
Within an orthonormal system consider points A(1,4) B(5,1) C(4,8) (a)Calculate the angle ABC (b)Show that 3x+4y19=0 is an equation for line L which passes through A and B (c)Find a vector equation for line L (d)(i)give an equation for the circle with the
asked by Anonymous on May 4, 2008 
Maths
In an orthonormal system, you're given the following: Point P(1,2) Lina a=cartesian eqn:4x3y+6=0 Line b=parametric eqns:x=5+3& y=& (real n°) Circle z=cartesian eqn:x²+y²2x3=0 (a)Calculate the angle between lines a an b (b)Calculate the coordinates
asked by Anonymous on May 4, 2008 
Mathematics
In an orthonormal system, you're given the following: Point P(1,2) Lina a=cartesian eqn:4x3y+6=0 Line b=parametric eqns:x=5+3& y=& (real n°) Circle z=cartesian eqn:x²+y²2x3=0 (a)Calculate the angle between lines a an b (b)Calculate the coordinates
asked by Anonymous on May 18, 2008 
Geometry
Please answer at least one . PLEASE 1. Triangle XYZ has a right angle at Y. V,W are on XZ such that XV=XY. WZ=YZ, find ANGLE VYW . 2. STUVWXYZ is a regular octagon. Find SW/ TZ. 3. The interior angles of a convex polygon form an arithmetic progression with
asked by Jayden on October 19, 2013 
Geometry
ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If \angle BCA = 39 ^\circ and \angle EBA = 2 \angle DAB , what is the measure of \angle ABC(in degrees)?
asked by John on March 1, 2013 
Geometry
ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If \angle BCA = 39 ^\circ and \angle EBA = 2 \angle DAB , what is the measure of \angle ABC (in degrees)?
asked by John on February 28, 2013 
help math
In triangle ABC, points D,E,F are on sides BC,CA,AB respectively such that AD,BE,CF are angle bisectors of triangle ABC. The linesAD,BE,CF are concurrent at I,the incenter of triangle ABC. If Angle BAC=90, what is the measure (in degrees) of Angle EIF?
asked by andrew on May 28, 2013 
MATH HELP!!
Consider the three points A(2,3,1) B(1,2,3) C(7,4,6) a) Show that ABC is a right triangle. b) Calculate the area of this triangle. c) Find the coordinates of the center of the circle circumscribed about triangle ABC
asked by Christine on September 28, 2016 
math
Let f be the function defined on {3, 1} by f (x)= (x+1)/x^2+ax+b and (C) its representative curve in an orthonormal system . Knowing that the two lines of equations x=1 and x=3 are asymptotes to (C) calculate the values of a and b.
asked by vicky on June 23, 2016 
math
point A(1,2) B(7,2) C(k,4) K is a constant. The vertices of ABC. Angle ABC is a right angle. Ive worked out the gradient of AB to be 1/2. And the negative reciprocals is 2. How do you calculate the value of k?? thanks for the help
asked by liam on October 13, 2010 
math
point A(1,2) B(7,2) C(k,4) K is a constant. The vertices of ABC. Angle ABC is a right angle. Ive worked out the gradient of AB to be 1/2. And the negative reciprocals is 2. How do you calculate the value of k?? thanks for the help
asked by liam on October 13, 2010 
math
point A(1,2) B(7,2) C(k,4) K is a constant. The vertices of ABC. Angle ABC is a right angle. Ive worked out the gradient of AB to be 1/2. How do you calculate the value of k?? thanks for the help
asked by liam on October 13, 2010 
geometry
line BD bisects angle ABC. Solve for X and find the measures of angle ABC. angle ABD= 5X, angle DBC= 3X + 10 I don't really understand this question so can someone please help me solve this and explain to me how they solved it/ show the steps of how to
asked by Tonya on September 2, 2014 
maths
ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of \angle ABC (in degrees)?
asked by rohit on March 30, 2013 
Geometry
ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of \angle ABC (in degrees)?
asked by Dan on March 26, 2013 
heeeeeeeeeeeeeeeeeeeelp maths
In triangle ABC, points D,E,F are on sides BC,CA,AB respectively such that AD,BE,CF are angle bisectors of triangle ABC. The lines AD,BE,CF are concurrent at I, the incenter of triangle ABC. If ∠BAC=92∘, what is the measure (in degrees) of ∠EIF?
asked by andrew on May 28, 2013 
Math
In triangle ABC, points D,E,F are on sides BC,CA,AB respectively such that AD,BE,CF are angle bisectors of triangle ABC. The lines AD,BE,CF are concurrent at I, the incenter of triangle ABC. If ∠BAC=92∘, what is the measure (in degrees) of ∠EIF?
asked by John on May 27, 2013 
Math
In Triangle ABC, medians BE and CD are produced respectively to points X and Y such that CD=DX and BE=EY as shown in the figure. Show that the points X, A and Y are collinear. Also show that A is the mid point of XY
asked by Somanna on June 5, 2015 
MATH
In Triangle ABC, medians BE and CD are produced respectively to points X and Y such that CD=DX and BE=EY as shown in the figure. Show that the points X, A and Y are collinear. Also show that A is the mid point of XY
asked by PRIYA on March 11, 2016 
9th grade
given that a(1,8) ,b(2,4) and if the line y=4 is the axis of symmetry of triangle abc find c.show that triangle abc is an isosceles triangle,calculate the area of triangle abc,calculate the perpendicular distance from a to bc
asked by anum on March 23, 2010 
Mathematics
In right angled triangle ABC,angle B=90degree and AB=√34unit.The coordinates of points B,C are(4,2)&(1,y).if ar(ABC)=17units then find the value of y
asked by Saayra on April 2, 2017 
geoMETRY!
ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If ∠BCA=39∘ and ∠EBA=2∠DAB, what is the measure of ∠ABC (in degrees)?
asked by BATMAN on February 26, 2013 
geometry!
ABC is an acute angle triangle with points D and E on BC and AC, respectively such that BE and AD are altitudes. AD and BE intersect at H. If ∠BCA=39∘ and ∠EBA=2∠DAB, what is the measure of ∠ABC (in degrees)?
asked by Anonymous...urgent! on February 28, 2013 
Johan
Given angle 1 = (x + 7)degree, angle 2 = *(2x 3)degree, angle ABC = (x 2nd power) degree, angle D = (5x  4)degree. Show that angle ABC congruent to angle D I can't seem to solve this?
asked by Sia on September 4, 2012 
geometry
Points D, E, and F are the midpoints of sides \overline{BC}, \overline{CA}, and \overline{AB} of \triangle ABC, respectively, and \overline{CZ} is an altitude of the triangle. If \angle BAC = 71^\circ, \angle ABC = 39^\circ, and \angle BCA = 70^\circ, then
asked by kat on July 23, 2014 
geometry
Points D, E, and F are the midpoints of sides \overline{BC}, \overline{CA}, and \overline{AB} of \triangle ABC, respectively, and \overline{CZ} is an altitude of the triangle. If \angle BAC = 71^\circ, \angle ABC = 39^\circ, and \angle BCA = 70^\circ, then
asked by kat on July 23, 2014 
Geometry
Points D, E, and F are the midpoints of sides \overline{BC}, \overline{CA}, and \overline{AB} of \triangle ABC, respectively, and \overline{CZ} is an altitude of the triangle. If \angle BAC = 71^\circ, \angle ABC = 39^\circ, and \angle BCA = 70^\circ, then
asked by Krash on December 16, 2014 
geometry
obtuse triangle ABC with obtuse angle B. Point D on side AC such that angle BDC is also obtuse. Angle DAB is 2/3 of angle ABD. Angle BCD is 1/5 of angle CBD is 4 more than angle BAD. Find the measure of angle ABC.
asked by suzy on November 30, 2010 
Math
This question makes reference to an orthonormal basis (i,j), and an origin O. 1. Consider the triangle ABC, with vertices A(0,2), B(9,1), C(1,11). Find: a) a cartesian equation of the altitude from C; b) a cartesian equation of the circle which has BC as
asked by Anonymous on February 27, 2008 
geometry
In triangle ABC, AB=5 cm, BC=12 cm and angle ABC=90 degree, calculate the length of AC.
asked by Bhuvanesh. D on September 28, 2014 
Linear Algebra  Question
I have this number that I just wanted to be sure how to do. They give me a Parallelepiped with corners lettered from A to H. Then the question is: In a certain orthonormal reference, the coordinates of points A, B, D and E are respectively A(0,0,2)
asked by Jer on April 29, 2012 
Linear Algebra  Question
I have this number that I just wanted to be sure how to do. They give me a Parallelepiped with corners lettered from A to H. Then the question is: In a certain orthonormal reference, the coordinates of points A, B, D and E are respectively A(0,0,2)
asked by Jer on April 29, 2012 
Linear Algebra  Question
I have this number that I just wanted to be sure how to do. They give me a Parallelepiped with corners lettered from A to H. Then the question is: In a certain orthonormal reference, the coordinates of points A, B, D and E are respectively A(0,0,2)
asked by Jer on April 30, 2012 
Math
Someone please explain these! The angle between two planes is defined as the angle between their normals. Determine the angle theta between 0 and 90 degrees between the given planes. a) 2x+3yz+9 = 0 and x+2y+4 = 0
asked by Alex on April 17, 2008 
Math
Someone please explain these! The angle between two planes is defined as the angle between their normals. Determine the angle theta between 0 and 90 degrees between the given planes. a) 2x+3yz+9 = 0 and x+2y+4 = 0
asked by Alex on April 17, 2008 
Math
Someone please explain these! The angle between two planes is defined as the angle between their normals. Determine the angle theta between 0 and 90 degrees between the given planes. a) 2x+3yz+9 = 0 and x+2y+4 = 0
asked by Alex on April 17, 2008 
Math
In the triangle ABC, AC=2cm, AB=x cm and angle ABC=π/2 rad. 1. Given that angle BAC=ϴ rad, and that ϴ is a sufficiently small angle, show that x≈ a + bϴ^2, where a and b are constants to be determined. 2. For this part, ϴ is not assumed to be a
asked by John on November 30, 2016 
Math
In the triangle ABC, AC=2cm, AB=x cm and angle ABC=π/2 rad. 1. Given that angle BAC=ϴ rad, and that ϴ is a sufficiently small angle, show that x≈ a + bϴ^2, where a and b are constants to be determined. 2. For this part, ϴ is not assumed to be a
asked by John on December 1, 2016 
geometry
measure of angle ABC=4x12 measure of angle ABX=24 BX bisects ABC solve for X and find the measure of angle ABC **page 48 # 11 of prentice hall,california geometry**
asked by Terry on September 27, 2011 
geometry
measure of angle ABC=4x12 measure of angle ABX=24 BX bisects ABC solve for X and find the measure of angle ABC **page 48 # 11 of prentice hall,california geometry**
asked by Terry on September 27, 2011 
Geometry
Given: obtuse triangle ABC with obtuse angle B. Point D on side AC such that angle BDC is also obtuse. Angle DAB is 2/3 of angle ABD. Angle BCD is 1/5 angle BDC and angle CBD is 4 more than angle BAD. What is the measure of angle ABC?
asked by Kathy on December 12, 2010 
Geometry
Angle ABC and ange DBE are vertical angles,the measure of angle ABC =3x+20, and the measure or angle DBE =4x10. Write and solve an equation to find the measure of angle ABC and the measure of angle DBEin
asked by Amber on September 2, 2012 
Geometry
Angle ABC and ange DBE are vertical angles,the measure of angle ABC =3x+20, and the measure or angle DBE =4x10. Write and solve an equation to find the measure of angle ABC and the measure of angle DBEin
asked by Amber on September 2, 2012 
geomtery
IN ABC, m
asked by pam on December 21, 2015 
MATH_URGENT
Point X is on side \overline{AC} of \triangle ABC such that \angle AXB =\angle ABX, and \angle ABC  \angle ACB = 39 degrees. Find \angle XBC in degrees.
asked by RhUaNg on March 13, 2014 
Mathematics
Triangle ABC has ∠A=40∘, ∠B=60∘, ∠C=80∘. Points M,N trisect the side BC and points P,Q trisect the side AC. The lines AM,AN,BP,BQ intersect at the points S,T,U,V as shown in the figure below, dividing the triangle into 9 regions. Determine the
asked by Steve on June 16, 2013 
Math
Triangle ABC has ∠A=40∘, ∠B=60∘, ∠C=80∘. Points M,N trisect the side BC and points P,Q trisect the side AC. The lines AM,AN,BP,BQ intersect at the points S,T,U,V as shown in the figure below, dividing the triangle into 9 regions. Determine the
asked by Bob on June 14, 2013 
math
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of ∠BAC. If CN/NB=21, what is CM/MB?
asked by Gandu man on May 18, 2013 
Geometry
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of ÚBAC. If CN/NB =21 , what is CM/MB ?
asked by Andrew on May 16, 2013 
MATHS
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of ∠BAC. If CN/NB=21, what is CM/MB?
asked by HELP!! on May 17, 2013 
heeelp MATH
ABC is a triangle with a right angle at A.M and N are points on BC such that AM is the altitude, and AN is the angle bisector of ∠BAC. If CN/NB=21,what is CM/MB?
asked by Anubhav on May 16, 2013 
Math (Geometry)
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of ∠BAC. If CN/NB=21, what is CM/MB?
asked by Dan on May 16, 2013 
Math (Geometry)
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of ∠BAC. If CN/NB=21, what is CM/MB?
asked by Dan on May 15, 2013 
math
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of ∠BAC. If CNNB=21, what is CMMB?
asked by Anonymous on May 16, 2013 
Math
In the triangle ABC, angle ABC is x, angle BCA is x+40, and angle CAB is 2x. What is the measure of the largest angle (in degrees) ?
asked by sadf on November 10, 2010 
math
how do you name a obtuse angle when you are naming an angle just look for where the angle occurs and when writting it place it in the middle of the three points and draw a little triangle thingy over the top for eg. angle ABC would mean the angle occurs at
asked by zaire on March 8, 2007 
Geometry
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of A. If CN/NB=21, what is CM/MB ?
asked by AA on May 13, 2013 
Geometry
in triaangle ABC, AB=20 cm, AC=15 cm the length of the altitude AN is 12 cm prove that ABC is a right triangle so far i got that angle ANC is 90 degrees by definition on altitude i got really confused after so can you show me how to answer the question and
asked by Ashley on September 13, 2017 
Mathematics
If triangle ABC and triangle XYZ,if angle A and angle X are acute angles such thay cosa=cosx then show that angle A=angle X?
asked by Sai Manogna on April 14, 2017 
Maths
X and Y are points on the sides BC and AC of a triangle ABC respectively such that angle AXC = angle BYC and BX = XY. Prove that AX bisects the angle BAC. I believe the first step is to prove ABXY is a cyclic quadrilateral. Unfortunately, I don't know
asked by Bobby on July 20, 2008 
geomerty
The following triangles, Ä ABC and Ä DEF, are congruent. abc 67.38degree 12cm lenght 22.62degree b5cm,l,13cm Find the lengths of all missing sides and measures of all angles for both triangles. Include correct units with each of your answers. First
asked by kozy on May 11, 2011 
Math
In triangle ABC, angle C is a right angle. Find the measure of angle B if side b = 105 m and side c = 139 m. (Points : 1) 49° 59° 53° 47°
asked by CC on June 7, 2011 
Geometry
Line BD bisects angle ABC. Angle ABC= 9x. Angle ABD= 4x+13. Finds angle DBC
asked by Taylor on September 23, 2013 
Math
2 circles C1 and C2 meet at the points A and B. Points C and Dare points on the circumferences of C1 and C2 respectively such that angle CAB = angle DAB. CD cuts C1 and C2 at the points Y and X respectively. if Z is the foot of the perpendicular from X to
asked by Jun on September 19, 2012 
geometry
8. iN triangle ABC, a point D is on AC so that AB=AD. ANGLE ABC  ANGLE ACB = 30. IND ANGLE CBD. PLEASE TELL ME WHAT TO DO. I BEG YOU. PLEASE
asked by nicole on October 22, 2013 
geometry
Given that Vector BD Angle ABC, Measures Of Angle ABC =6x  12, And Angle = 72 Degres, Which Equations Could Be Used To Find The Value Of X? A  6x  12 = 72 B  1/2 (6x12) = 72 C  2(6x  12 = 72 D 6x  12= 2(72) Can Anyone Help Me How To Solve Or Help
asked by jacob on September 2, 2011 
GEOMETRY TRIANGLE
IN TRIANGLE ABC, A POINT D IS ON AC SO THAT AB=BD. ANGLE ABC  ANGLE ACB = 30. FIND ANGLE CBD HELP NNNNNDEEEEEDDDD PLEASE
asked by Barbie Lee on October 24, 2013 
Math
Given the points A(0,0),B(3,1),and C(1,4), what is the measure of angle ABC?
asked by Anonymous on February 25, 2013 
Math
Given the points A(0,0)B(3,1), and C(1,4), what is the measure of angle ABC?
asked by Anonymous on February 26, 2013 
Math
Given the points (A) 0,0 (B) 4,3 (C) 2,9 what is the measure of angle ABC
asked by Joe on March 30, 2016 
math
Can someone please help me with these problems?Out of 35 problems these are the ones I can not figure out.Please show all of the stepswith no shortcuts. I am sincerely trying to learn this stuff.Thanks 4y2+y+36=7y+405y 5.3x5.36=4.246.7x 6(x+4)=8(x2)
asked by barb on August 6, 2010 
maths
Let ABC be a triangle in the plane. Find circles C0;C1; : : : ;C6 such that Cj has exactly j points in common with the boundary of ABC (this \boundary" consists of the line segments AB, BC, CA). Is it possible to nd a circle C7 with 7 points in common with
asked by jenny on October 12, 2012 
geometry
Angle ABC and angle EBF are a pair verical angles. The measurement of angle ABC = 3X + 8 and the measurement of angle EBF = 2X + 48. What are the measurements of angle ABC and angle EBF
asked by amy on August 11, 2011 
math
Plot the points A(2,2), B(4,6),C(10,2)Notice that these points are vertices of a right triangle (the angle is 90 degrees). Find the area of the triangle ABC:
asked by katrina on February 3, 2011 
Geometry
line BD bisects angle ABC. Find angle ABD, angle CBD, and angle ABC if angle ABD equals 3x+6 and angle DBC equals 7x18 please help it would mean a lot
asked by Laura on September 10, 2015 
pls help w/t math ?
in a right triangle ABC, if ab is 14 and bc is 12 wut is bd? there is a pic of a large trangle abc and in it is a line drawn down angle c making it line cd. angle acd then becomes a right trangle as well. i tried working = proportions and pyth thm but i
asked by shawna on July 16, 2007 
Math(Geometry)
In the diagram below(no diagram but details will be provided), right triangle ABC and line BD is an altitude to side line AC. * Prove that (AB)^2=(AC)(AD) When you label the triangle B should be were the right angle is C should be at the top of the
asked by Phyllis on November 24, 2010 
geometry
draw a triangle abc with abc ab =4.5 ,angle abc=35,angle acb=65
asked by mudit on November 26, 2012 
Math
the triangle ABC., BC = 12cm, ABC = 80 degree and ACB = 30 degree Calculate the area of triangle ABC. asked by Kd today at 3:06pm angle BAC = 1808030 = .... now find AB using the Sine Law. Area of triangle = (1/2)(AB)(BC)sin80° = .... you do the
asked by Kd on September 12, 2018 
ALGEBRA 2
In triangle ABC , angle C is a right angle. Find the remaining sides and angles. Round your answers to the nearest tenth. Show your work
asked by SAM on November 28, 2014 
geometry

trigo
In a right tringle ,angle ABC has a value of 37 degree while its opposite side is equal to 5,where angle c=90 degree Find A.)Remaining sides of the triangle B.)Angle ABC using any trigonometry Functions
asked by William john on July 12, 2011 
Math
cosine law Given the points A(0,0) B (3,1) and C (1,4) what is the measure of angle ABC
asked by Giuseppe on December 9, 2015 
Math
Given the points A(0,0), B(4, 3) and C(2,9), what is the measure of angle ABC? Using Law of Cosines.
asked by jasmine on July 21, 2013 
geometry
in triangle ABC, PandQ are points on BC such that BQ=CP and AP=AQ.show thatAB=AC
asked by DEE on January 12, 2018 
math
Rays AB and BC are perpendicular. Point D lies in the interior of angle ABC. If Angle ABD = 4r7 and angle DCB = 8r+1, find angles ABC and DCB.
asked by Sarah on September 8, 2012 
MATHS
In triangle ABC, BC is produced to D. If angle ACD = 110 degree and angle ABC = 70 degree. Find angle BAC. Give reason.
asked by Job on March 12, 2012 
Trigonometry
ABC is a right triangle with AB = 2, BC = 3\sqrt{5}, AC = 7 and \angle ABC = 90^\circ. If \cos \angle BAC = \frac{a}{b}, where a and b are coprime positive integers, what is the value of a + b?
asked by Dan on March 27, 2013 
Math
Triangle ABC is similar to triangle APQ, with angle CBA equal to angle QPA and angle A common to both triangles. The lengths of sides AB, AP and PQ are 90 cm, 60 cm and 30 cm. Calculate the length of side BC.
asked by Golkhadi nep on June 4, 2010 
precalc
Points A, B, and C are on the circumference of a circle with radius 2 such that angle BAC = 45 degrees and angle ACB = 60 degrees. Find the area of triangle ABC.
asked by katie on July 15, 2016 
Trigonometry/Geometry
In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB = DE, BC = EF, and angle A = angle D, then we cannot deduce that ABC and DEF are congruent. However, there are a few
asked by Sam on November 19, 2013 
Geometry
Point D is on the interior of angle ABC. Use the given information to find m angle DBC. (Draw the picture.) M angle ABC = (5x +6) M angle ABD = (7x  9) M angle DBC = (5x  6) Answer so far: (5x + 6) + (5x  6) = (7x  9) 10x = 7x  9 10 x  7x = 9 3x =
asked by Justin on October 5, 2015 
Precalculus
In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB = DE, BC = EF, and angle A = angle D, then we cannot deduce that ABC and DEF are congruent. However, there are a few
asked by John on February 24, 2014 
Advanced Cost Managemement
Problem 1  Aunt Ethel's Fancy Cookie Company manufactures and sells three flavors of cookies: macaroon, sugar, and buttercream. The batch size for the cookies is limited to 1,000 cookies based on the size of the ovens and cookie molds owned by the
asked by Veronica on July 15, 2012 
geometry
Find m
asked by Sharon on October 10, 2010 
Mathematics
In the Triangle ABC, A=50, C=26 and AB is produced to D. Find ABC(B angle) and CBD(B angle). Answers are 104 and 76?
asked by Ali on March 23, 2019 
Math
I have math HW and these are the questions i wasn't aware of how to answer... please help. a)Prove that 4xy1=0 is parallel to y=4x5 b)Show that the points A(3,1), B(5,2) and C(11,5) are collinear c)Show that the lines y=2x4 and x+2y10=0 are
asked by Crissy on September 17, 2011 
maths
Let ABC be a triangle in the plane. Find circles C0;C1; : : : ;C6 such that Cj has exactly j points in common with the boundary of ABC (this \boundary" consists of the line segments AB, BC, CA). Is it possible to find a circle C7 with 7 points in common
asked by jenny on October 10, 2012 
Maths, Problem solving
In this triangle, angle BAC is 25% of the size of angle ABC. Angle ACB is 90 degrees less than triangle ABC. What is the Size of angle ABC?
asked by Olly on February 7, 2016 
Math
In a triangle ABC,AB=5cm,BC=12cm,angle ABC=90Â°calculate 1)the length of AC. 2)the area of the triangle 3)the length of the perpendicular from B to AC
asked by Anonymous on January 11, 2017
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