Friday

December 19, 2014

December 19, 2014

**Recent Homework Questions About Geometry**

Post a New Question | Current Questions

**Geometry**

ABC is a triangle with circumcenter O , obtuse angle BAC and AB<AC . M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC . If AD=1 2 (AB+AC) , what is the measure (in degrees) of ÚBAC ?
*Thursday, April 11, 2013 at 6:54pm*

**Geometry**

Let ƒÆ=sin −1 7 25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p...
*Thursday, April 11, 2013 at 6:17pm*

**Geometry**

ABC is a triangle with circumcenter O, obtuse angle BAC and AB less than AC. M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC. If 2AD=(AB+AC), what is the measure of angle BAC ?
*Thursday, April 11, 2013 at 11:27am*

**Geometry**

2x^2-9x-5=0 Is it possible to combine 2x squared with 9x? Not sure how to tackle solving this one.
*Wednesday, April 10, 2013 at 9:26pm*

**geometry**

Which description does NOT guarantee that a trapezoid is isosceles? A. congruent bases B. congruent legs C. both pairs of base angles congruent D. congruent diagonals
*Tuesday, April 9, 2013 at 9:31pm*

**Geometry**

ABC is a triangle with circumcenter O , obtuse angle BAC and AB<AC . M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC . If AD=1 2 (AB+AC) , what is the measure (in degrees) of ÚBAC ?
*Monday, April 8, 2013 at 10:29pm*

**Analytic Geometry/Calculus**

We didn't go over the perpendicular form in class, only the parallel. Find the general form of the equation of the plane passing through the point and perpendicular to the specified vector or line.
*Monday, April 8, 2013 at 7:40pm*

**7th grade math/ geometry**

how to name an angle in four ways?
*Monday, April 8, 2013 at 7:26pm*

**geometry**

On my last question, just posted, I asked what percent of the area of the target was shaded. The answer options were 5%, 10%, 20% or 80%?
*Monday, April 8, 2013 at 6:45pm*

**geometry**

There is a square with a star inside. The square has 25cm to show the length of one side. On the right, outside the square, it says 125cm squared, with a line pointing the center of the star in the square. The question is; The target of a shooting game features a shaded star ...
*Monday, April 8, 2013 at 6:42pm*

**Math**

I think this is geometry: There is a small box with a black frame around it. Inside the box, at the bottom, is an 8. Inside the box, to the right, is a 2. It looks like they are showing Length & Height. On the outside of the box, under the 8, there is a 10. To the right, ...
*Monday, April 8, 2013 at 5:46pm*

**Geometry**

Convex quadrilateral ABCD has sides AB=BC=21, CD=15 and AD=9. Given additionally that ∠ABC=60∘, what is the length of BD?
*Monday, April 8, 2013 at 8:49am*

**geometry**

The ratio of two similar prisms is 2:5 the volume of the larger is 375cm3 if sand is being poured into the smaller prism at 3cm3 per second how many seconds will it tAke to fill the smaller prism?
*Sunday, April 7, 2013 at 9:40pm*

**Geometry**

A sphere has a great circle circumference of 40pi feet. What's its volume?
*Sunday, April 7, 2013 at 6:31pm*

**Geometry**

Lobster fishers in Maine often use spherical buoys to mark their lobster traps. Every year the buoys must be repainted. An average buoy has a 12 inch diameter, and an average fisher has about 500 buoys. A quart of marine paint covers 175 ft squared. How many quarts of paint ...
*Sunday, April 7, 2013 at 5:33pm*

**geometry**

camera is 4 ft 6 inched off the ground 18 feet away from a silo, how tall is the silo
*Saturday, April 6, 2013 at 10:54am*

**geometry**

LMNO is a parallelogram. If NM = x + 15 and OL = 3x + 5, find the value of x, then find NM and OL
*Friday, April 5, 2013 at 9:25am*

**Geometry**

ABCD is a parallelogram. If ÚABC=35 degrees , what is the measure (in degrees) of ÚADC ?
*Friday, April 5, 2013 at 12:12am*

**Geometry**

How many three digit numbers have three distinct digits?
*Friday, April 5, 2013 at 12:01am*

**geometry**

if the midpoints of the sides of a parallelogram in succession are joined, the quadrilatral formed is a a parallogram. Prove this theorem in euclidean geometry using analytic techniques
*Thursday, April 4, 2013 at 7:29pm*

**Analytic Geometry - lengths?**

Square ABCD has sides of length 4, and M is the midpoint of CD . A circle with radius 2 and center intersects a circle with radius 4 and center A at points P and D . What is the distance from P to AD? Please help - I drew the diagram, but looks kinda wierd, and dunno which ...
*Thursday, April 4, 2013 at 5:34pm*

**geometry**

In the diagram, circle A is tangent to circle C, and segment BE is tangent to circle A. The radius of circle A is 11 meters and the radius of circle C is 8 meters. Find the area of triangle ABE to the nearest square meter.
*Thursday, April 4, 2013 at 1:30am*

**geometry**

Which quadrilaterals have 2 pairs of parallel sides?
*Wednesday, April 3, 2013 at 4:20pm*

**geometry**

A board on the wall in Jeremy's class has 4 right angles, 4 equal sides, and 2 pairs of parallel sides. Which quadrilateral is it?
*Wednesday, April 3, 2013 at 3:52pm*

**Analytic Geometry - Circles and Areas**

Let R denote the circular region bounded by x^2+y^2 = 36. The lines x=4 and y=3 partition R into four regions R1, R2 ,R3 , and R4. Let [Ri] denote the area of region Ri. If [R1]>[R2]>[R3]>[R4] , then compute [R1]-[R2]-[R3]+[R4]. Could someone help me, I don't ...
*Wednesday, April 3, 2013 at 7:36am*

**geometry**

Chris is making a painting with only triangles. He wants each side of the triangles to be the same length. What kind of triangle will he paint?
*Tuesday, April 2, 2013 at 10:31pm*

**geometry**

n the xy -plane, the graph of y = x^2 and the circle with center (0,1) and radius 3 have how many points of intersection?
*Tuesday, April 2, 2013 at 4:23pm*

**geometry**

a point F is at a certain distance from a line AB .Another point P is moving in a plane such that the ratio of it's distance from F and line AB remains constant .find the locus of the point P
*Tuesday, April 2, 2013 at 12:42pm*

**GEOmetry(Special Coin Placement)**

Three coins are randomly placed into different positions on a 4×10 grid. The probability that no two coins are in the same row or column can be expressed as a/b where a and b are coprime positive integers. What is the sum of a+b?
*Tuesday, April 2, 2013 at 3:56am*

**GEOMETRY(POLYGON)**

A regular polygon has interior angles of 150∘. A,B,C,D are 4 consecutive points of this polygon. What is the measure (in degrees) of ∠ADC?
*Tuesday, April 2, 2013 at 3:39am*

**Geometry**

What is the surface area and lateral area of a regular triangular pyramid if the slant is 7 and the altitude is 5?
*Monday, April 1, 2013 at 10:40pm*

**geometry**

Derive the distance formula (d) shown below for points A = (x1, y1, z1) and D = (x2, y2, z2). 2 2 1 2 2 1 2 d = (x2 − x1) + (y − y ) + (z
*Monday, April 1, 2013 at 1:42pm*

**Geometry: Student Correction (Stuck)**

Joelle set up the following proportion: 4/6 = 5/x. Solve for x. Determine if proportion is correct. If not, explain what is wrong with it.
*Friday, March 29, 2013 at 2:34pm*

**Geometry **

Triangle ABC has vertices of A(0,0), B(–4,0)and C(–2,4). The coordinates of each vertex in triangle AEF are multiplied by 3 Is triangle ABC~AEF? Explain.
*Friday, March 29, 2013 at 2:31pm*

**geometry**

if the measurement of angle 1 plus the measurement of angle 4 equals 70, find the sum of angle 6 and angle 7
*Friday, March 29, 2013 at 2:00pm*

**geometry**

126x72 two sides of a triangle what is the third side
*Friday, March 29, 2013 at 1:24am*

**Geometry**

Find the surface area of a cylinder whereas diameter is 9 ft and height is 24 ft
*Thursday, March 28, 2013 at 1:02am*

**Geometry**

A right triangular prism has volume equal to 288 cm^3 . The height of the prism is 3 cm. One of the bases of the triangular face (not the hypotenuse) is equal to 12 cm, determine the length of the hypotenuse (in cm) of the triangular face.
*Thursday, March 28, 2013 at 12:18am*

**Geometry**

A right triangular prism has volume equal to 288 cm^3 . The height of the prism is 3 cm. One of the bases of the triangular face (not the hypotenuse) is equal to 12 cm, determine the length of the hypotenuse (in cm) of the triangular face.
*Thursday, March 28, 2013 at 12:18am*

**Geometry**

A right triangular prism has volume equal to 288 cm^3 . The height of the prism is 3 cm. One of the bases of the triangular face (not the hypotenuse) is equal to 12 cm, determine the length of the hypotenuse (in cm) of the triangular face.
*Thursday, March 28, 2013 at 12:18am*

**Geometry**

The vertices of a regular 10-gon are labeled V_1, V_2, \ldots V_n, which is a permutation of \{ 1, 2, \ldots, 10\}. Define a neighboring sum to be the sum of 3 consecutive vertices V_i, V_{i+1} and V_{i+2} [where V_{11}=V_1, V_{12}=V_2]. For each permutation \sigma, let N_\...
*Wednesday, March 27, 2013 at 11:53pm*

**Geometry**

ABCD is a trapezoid with AB < CD and AB parallel to CD. \Gamma is a circle inscribed in ABCD, such that \Gamma is tangent to all four sides. If AD = BC = 25 and the area of ABCD is 600, what is the radius of \Gamma?
*Wednesday, March 27, 2013 at 11:52pm*

**Geometry**

The value of y that minimizes the sum of the two distances from (3,5) to (1,y) and from (1,y) to (4,9) can be written as \frac{a}{b} where a and b are coprime positive integers. Find a + b.
*Wednesday, March 27, 2013 at 7:09pm*

**geometry**

The scale factor is 5/4. Find the area of the pre-image if the area of the image is 150 in2.Show your work.
*Wednesday, March 27, 2013 at 3:58pm*

**GEOMETRY**

The squares of a 3×3 grid of unit squares are coloured randomly and independently so that each square gets one of 5 colours. Three points are then chosen uniformly at random from inside the grid. The probability that these points all have the same colours can be ...
*Wednesday, March 27, 2013 at 3:05pm*

**Geometry**

The value of y that minimizes the sum of the two distances from (3,5) to (1,y) and from (1,y) to (4,9) can be written as \frac{a}{b} where a and b are coprime positive integers. Find a + b
*Wednesday, March 27, 2013 at 11:58am*

**Geometry**

ABCD is a quadrilateral inscribed in a circle with AB = 1, BC = 3, CD = 4 and DA = 6. What is the value of \sec^2 \angle BAD?
*Tuesday, March 26, 2013 at 11:34pm*

**Geometry**

Determine the number of subsets of A=\{1, 2, \ldots, 10\} whose sum of elements are greater than or equal to 28 .
*Tuesday, March 26, 2013 at 11:33pm*

**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)?
*Tuesday, March 26, 2013 at 11:31pm*

**Geometry**

ABC is an isosceles triangle where AB = AC and BC = 60. D is a point on BC such that the perpendicular distance from D to AB and AC is 16 and 32, respectively. What is the length of AB?
*Tuesday, March 26, 2013 at 11:31pm*

**Geometry**

Two points are chosen uniformly at random on the unit circle and joined to make a chord C_1. This process is repeated 3 more times to get chords C_2, C_3, C_4. The probability that no pair of chords intersect can be expressed as \frac{a}{b} where a and b are coprime positive ...
*Tuesday, March 26, 2013 at 11:29pm*

**Geometry**

Two points are chosen uniformly at random on the unit circle and joined to make a chord C_1. This process is repeated 3 more times to get chords C_2, C_3, C_4. The probability that no pair of chords intersect can be expressed as \frac{a}{b} where a and b are coprime positive ...
*Tuesday, March 26, 2013 at 11:29pm*

**Geometry**

When writing a math expression, any time there is an open bracket "(", it is eventually followed by a closed bracket ")". When we have a complicated expression, there may be several brackets nested amongst each other, such as in the expression (x+1)*((x-2...
*Tuesday, March 26, 2013 at 11:27pm*

**geometry**

what is tan-1 3.5= to
*Tuesday, March 26, 2013 at 7:59pm*

**Geometry**

When you use the distance formula, you are building a _____ triangle whose hypotenuse goes between two given points. A.right B.equilateral C.acute D.None of these
*Tuesday, March 26, 2013 at 10:02am*

**geometry**

The volume of a small circle is 10 cubic meters. Find the volume of the larger sphere in cubis meters.
*Tuesday, March 26, 2013 at 9:58am*

**geometry**

A. Derive the distance formula (d) shown below for points A = (x1, y1) and B = (x2, y2). 2 2 1 2 2 1 d = (x − x ) + ( y − y ) Note: Look for an application of the Pythagorean theorem where the red line, segment AB, is the hypotenuse of a right triangle. You can ...
*Monday, March 25, 2013 at 1:58pm*

**geometry**

can someone please show me the answer for this problem ? a tree is situated on level ground from a point 135 feet from the base of the tree the measure of the angle of elevation from the ground to the top of the tree is 43 degrees which is the height of the tree to the nearest...
*Monday, March 25, 2013 at 1:39pm*

**CST GEOMETRY**

a tree is situated on level ground from a point 135 feet from the base of the tree the measure of the angle of elevation from the ground to the top of the tree is 43 degrees which is the height of the tree to the nearest foot?
*Monday, March 25, 2013 at 1:23pm*

**GEOMETRY(CIRCLE)**

Three circles with different radii have their centers on a line. The two smaller circles are inside the largest circle, and each circle is tangent to the other two. The radius of the largest circle is 10 meters. Together the area of the two smaller circles is 68% of the area ...
*Monday, March 25, 2013 at 2:11am*

**GEOMetry(TRIANGLE)**

ABC is an isosceles triangle where AB=AC and BC=60. D is a point on BC such that the perpendicular distance from D to AB and AC is 16 and 32, respectively. What is the length of AB?
*Monday, March 25, 2013 at 2:10am*

**GEOmetry!!.....**

ABCD is a trapezoid with AB<CD and AB parallel to CD. Γ is a circle inscribed in ABCD, such that Γ is tangent to all four sides. If AD=BC=25 and the area of ABCD is 600, what is the radius of Γ?
*Monday, March 25, 2013 at 2:05am*

**Please help with circle tangents geometry**

Two circles of different sizes are tangent at T. A is on the smaller circle, whereas B is on the larger one. Also, segment CD is tangent to the smaller circle, and crosses the goes through the larger circle and hits the other side at D. TD is a diameter, and AB || CD. If the ...
*Sunday, March 24, 2013 at 8:17am*

**geometry**

The measures of two consecutive angles of a parallelogram are in the Ratio 3:7. Find the measure of an acute angle of the parallelogram
*Saturday, March 23, 2013 at 3:16pm*

**Geometry**

The length of one base of a trapezoid is 19 inches and the length of the median is 16 inches. Find the length of the other base.
*Friday, March 22, 2013 at 12:08am*

**Geometry**

Abcd is an isosceles trapezoid with a(10,-1) b(8,3) and c(-1,3). Find the coordinates of d
*Friday, March 22, 2013 at 12:04am*

**Geometry**

For diagonals of square Abcd intersect at e . If ae =2x+6 and bd =6x-10 find ac
*Thursday, March 21, 2013 at 11:35pm*

**Geometry**

ABCD is a rectangle with B(-4,2) andD (10, 6). find the coordinates of A. Please help and tell me how you got it so I can understand
*Thursday, March 21, 2013 at 10:17pm*

**Geometry**

ABCD is a rectangle with B(-4,2) andD (10, 6). find the coordinates of A. Please help and tell me how you got it so I can understand
*Thursday, March 21, 2013 at 10:17pm*

**Geometry**

Find the sum of the measures of the exterior angles of a convex 39-gon?
*Thursday, March 21, 2013 at 10:01pm*

**Circle Geometry - chords in a circle**

Let PQ, RS , and TU be parallel chords of a circle. The distance between chords PQ and RS is 4, and the distance between chords RS and TU is also 4. If PQ = 78 TU=50 , then find RS. how to do this? Draw some lines?
*Thursday, March 21, 2013 at 9:01pm*

**Math (Geometry)**

Given: ABCD is arhombus. prove:AC bisects angle BAD and angel BCD.
*Thursday, March 21, 2013 at 6:12pm*

**algebra and geometry **

1) in a random survey of students, 152 students could swim and 48 could not. what is the probability that a student can swim? 2) suppose you spin two spinners, one marked 1 through 4 and the other marked A through E. how many possible outcomes are there? 3) an ice cream store ...
*Thursday, March 21, 2013 at 5:34pm*

**geometry**

Cone a is 9 inches tall and has a diameter of 8 inches. Cone b has a diameter of 12 inches. What height does cone b need to be in order to hold the same volume as cone A
*Thursday, March 21, 2013 at 5:34pm*

**GEOMETRY**

Let P=(p1,p2,…,p7) be a permutation of the integers 1,2,…7. For how many permutations P are all seven sums S1=p1,S2=p1+p2,…,S7=p1+p2+⋯+p7 not multiples of 3?
*Thursday, March 21, 2013 at 5:14pm*

**GEOMETRY**

A right triangle has perimeter equal to 198 and area equal to 1386. What is the length of the hypotenuse?
*Thursday, March 21, 2013 at 5:13pm*

**Geometry - Circles and tangents**

Two circles of radius 1 are externally tangent at Q . Let PQ and QR be diameters of the two circles. From P a tangent is drawn to the circle with diameter QR , and from R a parallel tangent is drawn to the circle with diameter PQ . Find the distance between these two tangent ...
*Thursday, March 21, 2013 at 5:07pm*

**Geometry - semicircle inside isosceles triangle**

Isosceles triangle ABC has sides of length AB=AC=25 and BC=40 . Find the area of a semicircle inscribed in triangle ABC with diameter along BC . Please help I do not know how to start....
*Thursday, March 21, 2013 at 2:14pm*

**geometry**

A wall pennant is in the shape of an isosceles triangle. Each of the two equal sides measures 18 in more than the third side, and the perimeter of the triangle is 54in. What are the lengths of the sides of the pennant?
*Thursday, March 21, 2013 at 11:41am*

**GEOMETRY**

ANGLES X AND Y ARE SUPPLEMENTARY ,AND THE MEASURE OF ANGLES X IS 24 DEGREES GREATER THAN THE MEASURE OF ANGLE Y. FIND THE ANGLE MEASURES.
*Wednesday, March 20, 2013 at 10:44pm*

**geometry**

Lin says that a hexagon has six sides. Chris says that it has eight sides. Whose statement is correct?
*Wednesday, March 20, 2013 at 2:42pm*

**geometry**

the perimeter of a quadrilateral is 30 cm. what is the maximum possible area of the quadrilateral.
*Wednesday, March 20, 2013 at 1:56am*

**geometry**

Ok, so I have this worksheet due, and it's for a lot of points, so can you check over my answers please? Can you leave your email so I could forward the scan to you? The worksheet has a lot of labeled shapes, so it's hard to describe in text. These are the answers that...
*Tuesday, March 19, 2013 at 1:51pm*

**analytic geometry/graphing problem**

The vertices of a triangle are the points of intersection of the line y=-x-1, x=2 and y = 1/5x + 13/5. Find an equation of the circle passing through all three vertices. I don't understand how to solve this: should I set them all equal to find the vertices? But afterwards...
*Tuesday, March 19, 2013 at 1:47pm*

**simple GEOMETRY!!**

In triangle ABC, ∠ABC=30∘,∠ACB=60∘;. D is a point in triangle ABC such that DB and DC bisect angles ABC and ACB respectively. What is the measure (in degrees) of ∠BDC?
*Tuesday, March 19, 2013 at 7:07am*

**geometry**

The angles in triangle ABC satisfy 6sin∠A=3√3sin∠B=2ͩ0;2sin∠C. If sin2∠A=a/b, where a and b are coprime positive integers, what is the value of a+b?
*Monday, March 18, 2013 at 8:26pm*

**geometry**

ABCD is a parallelogram. Let C′ be a point on AC extended such that the length of AC′=1.2AC. Let D′ be on the segment BD such that the length of BD′=0.9BD. The ratio of the area of the quadrilateral ABC′D′ to the area of the parallelogram ...
*Monday, March 18, 2013 at 8:12pm*

**Geometry**

A two-player game is played with two piles of stones, with sizes m,n. On a player's turn, that player can remove any number of stones from one pile, or the same number of stones from each pile. A player loses when they are unable to take a stone. If 1 \leq m,n \leq 30, for...
*Monday, March 18, 2013 at 7:29pm*

**geometry**

Consider the region in Quadrant 1 totally bounded by the 4 lines: x = 3, x = 9, y = 0, and y = mx (where m is positive). Determine the value of c such that the vertical line x = c bisects the area of that totally bounded region. Needless to say, your first task should be to ...
*Monday, March 18, 2013 at 7:25pm*

**geometry**

Consider the region in Quadrant 1 totally bounded by the 4 lines: x = 3, x = 9, y = 0, and y = mx (where m is positive). Determine the value of c such that the vertical line x = c bisects the area of that totally bounded region. Needless to say, your first task should be to ...
*Monday, March 18, 2013 at 7:18pm*

**geometry**

find the perimeter of the rectangle if the area is 6m+3m
*Monday, March 18, 2013 at 5:52pm*

**geometry**

Carlos want to show a rectangle in his drawing. What dotes he have to do to the drawing below to make the rectangle a closed shape?
*Monday, March 18, 2013 at 3:51pm*

**geometry**

A triangle has side lengths of 6, 8, and 9. What type of triangle is it?
*Monday, March 18, 2013 at 1:50pm*

**Geometry**

BC is a triangle with ∠BAC=60∘,AB=5 and AC=25. D is a point on the internal angle bisector of ∠BAC such that BD=DC. What is AD^2? It is not stated that D lies on BC. This assumption is not necessarily true.
*Monday, March 18, 2013 at 5:21am*

**Geometry**

ABC is a right angled triangle with ∠ABC=90∘ and side lengths AB=24 and BC=7. A semicircle is inscribed in ABC, such that the diameter is on AC and it is tangent to AB and BC. If the radius of the semicircle is an improper fraction of the form a/b, where a and b ...
*Monday, March 18, 2013 at 5:20am*

**chemistry**

Construct the correct structure for AsClF42-. Please construct the molecule such that the dipole is oriented vertically up or vertically down. - Name the type of hybrid orbitals the central atom forms. - Name the molecular geometry of the compound. - State whether the molecule...
*Monday, March 18, 2013 at 4:54am*

**Math Geometry**

A cube has 8 vertices. For each pair of distinct vertices, we connect them up with a line segment. There are (8) (2) =28 such line segments. For each of these 28 line segments, we mark the midpoint. How many distinct points have been marked as the midpoints?
*Monday, March 18, 2013 at 2:56am*

**geometry**

in the accompanying diagram, RST is a right triangle, SU is the altitude to hypotenuse RT, RT=16 and RU=7
*Monday, March 18, 2013 at 12:56am*

**geometry**

the perimeter of parallelogram QRST is 26cm. If ST=e 6cm what is the length of RS
*Sunday, March 17, 2013 at 9:30pm*

**geometry**

In the graph below, what is the line of reflection for XYZ and X'Y'Z'?
*Sunday, March 17, 2013 at 5:48pm*

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