# ABC is an obtuse triangle with m<A=21 and <C is acute. a)What is m<B+m<c?

8,444 results

1. ### Geometry

1. The sides of a triangle have lenghts x, x+4, and 20. Specify those values of x for which the triangle is acute with the longest side 20. 2. use the information to decide if triangle ABC is acute, right, or obtuse. AC=13, BC= sq. rt. 34, CD=3 >>i know this is obtuse ...
2. ### Math

Triangle ABC has angles measuring 137°, 15°, and 28°. Classify the triangle by its angle measures. right triangle acute triangle obtuse triangle multiangular triangle I thinks it's c
3. ### Math

USE THE INFORMATION TO DECIDE IF TRIANGLE ABC IS ACUTE, RIGHT, OR OBTUSE AC = 13 BC = sq rt. 34 CD = 3 I know the answer is obtuse but I don't know how to get there. The sq rts threw me off
4. ### Geometry

Can you help me with Always, Sometimes, Never questions?? I have answered all of these, but I am not sure if they are right. 1. The base angle of an isosceles triangle are acute----Always 2. When the altitude and the median are drawn from the same vertex of a triangle, the ...
5. ### math plz check ;-;

A triangle has sides of lengths 5 cm, 5 cm, and square root 47cm. Which of the following statements is true? A. The triangle is an obtuse triangle because (√47)^2>5^2+5^2 B. The triangle is an acute triangle because 5^2<5^2+(√47)^2 C. The triangle is an acute...
6. ### math plz check ;-; sorry

A triangle has sides of lengths 5 cm, 5 cm, and square root 47cm. Which of the following statements is true? A. The triangle is an obtuse triangle because (√47)^2>5^2+5^2 B. The triangle is an acute triangle because 5^2<5^2+(√47)^2 C. The triangle is an acute...
7. ### Geometry Honors

Can someone help me with Always, Sometimes, Never questions?? I have answered all of these, but I am not sure if they are right. 1. The base angle of an isosceles triangle are acute----Always 2. When the altitude and the median are drawn from the same vertex of a triangle, the...
8. ### Math

Can someone please check to see if I answered these true and false statements correctly? Thank you! 1. A triangle can have two right angles. (TRUE??) 2. An equilateral triangle is also an acute. (TRUE??) 3. A right triangle can also be an isosceles. (TRUE??) 4. A scalene ...
9. ### geometry

Joey says that triangle XYZ is obtuse. Robin disagrees because there are more acute angles then there are obtuse angles therefore it must be acute. Is either one of them correct? Explain your reasoning.
10. ### pre algebra check

The measures of two angles of a triangle are given. Tell whether the triangle is acute, right, or obtuse. 19°,35° I think its obtuse
11. ### math

This question is suppose to be simple but i keep getting it wrong Triangle LMN has vertices L(1, 6), M(6, 3) and N(5, 7). What type of triangle is Triangle LMN? Select all that apply Scalene triangle Right triangle Isosceles triangle Equilateral triangle Obtuse triangle Acute ...
12. ### Math

Which triangle is NOT possible to construct? Answers: A. A right isosceles triangle B. An acute equilateral triangle C. An Obtuse scalene triangle D. A right equilateral triangle My Answer: C. An Obtuse scalene triangle :) Thank you to anyone who helps. I appreciate it tons...
13. ### geometry

Classify the triangle with angles with measures 48,62 and 70 as acute right or obtuse A acute B right C obtuse
14. ### math plz help ;-;

A triangle has sides of lengths 5 cm, 5 cm, and square root 47cm. Which of the following statements is true? A. The triangle is an obtuse triangle because (√47)^2>5^2+5^2 B. The triangle is an acute triangle because 5^2<5^2+(√47)^2 C. The triangle is an acute...
15. ### Help me

11. Name the triangles that are classified by angles. right, scalene, isosceles scalene, isosceles, equilateral acute, right, obtuse obtuse, isosceles, acute 12. Classify the triangle by side length and angle measurement. scalene, acute isosceles, acute scalene, right ...
16. ### Math

Use the congruent triangles shown to answer question 6 and 7. 6. A. B. C. D. 7. Side BC is congruent to which side? A. ZX B. YX C. XY D. YZ 8. in the image below, ABC ~ DEF What is the length of EF and the measure of A. 27; 41 B. 27; 49 C. 36; 41 D.45; 49 9. What is the ...
17. ### 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.
18. ### math

The measures of the three angles of a triangle are given. Find the value of x and state whether the triangle is acute, obtuse, or right. x + 10, x − 20, x + 25 I got x is 55 and it is an acute angle. Is that correct?
19. ### Math

A triangle has side lengths 10, 15, and 7. Is the triangle acute, obtuse, or right? Show your work and explain. I think it's gonna be an obtuse and maybe right....might be wrong...
20. ### Math

Which triangle is NOT possible to construct? Answers: A. A right isosceles triangle B. An acute equilateral triangle C. An Obtuse scalene triangle D. A right equilateral triangle My Answer: C. An Obtuse scalene triangle :)
21. ### Math

A triangle has 2 angles that measure 60 each. Which of the following best describes thiz triangle. A. Right isoseles triangle B. Equilateral triangle C. Obtuse isosceles triangle D. Acute scalene triangle
22. ### Geometry

Please check my answers 1. A triangle has side lengths of 34 in, 20 in, and 47 in. Is the triangle acute, obtuse or right? a. Right b. Obtuse* c. Acute 2. Quilt squares are cut on the diagonal to form triangular quilt pieces. The hypotenuse of the resulting triangles is 26 ...
23. ### geometry

find the value of x in each triangle: triangle x has 1 angle at 53 degree for value x i got: 63.5 degree is that correct? Classify each triangle. 7. The measures of 2 angles are : 45 degree and 45 degree i got: acute 8. the measures of 2 angles are 15 degree and 47 degree i ...
24. ### geometry

find the value of x in each triangle: triangle x has 1 angle at 53 degree for value x i got: 63.5 degree is that correct? Classify each triangle. 7. The measures of 2 angles are : 45 degree and 45 degree i got: acute 8. the measures of 2 angles are 15 degree and 47 degree i ...
25. ### 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?
26. ### Math

1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute <H and the shorter diagonal. 3.Scalene right triangle SCA with midpointsL<M and N on SC, CA, and SA, respecitively. 4.Trapeoziod TRAP with TR|| A[, RE PA and P,E and A collinear 5.KIte KITE ...
27. ### math

Mr.Lewis drew a triangle measurement, x, .5x, and 1.5x. What is the best classification for this triangle? a. acute, scalene b. obtuse, scalene c. right, equilateral d. equiangular, equilateral e. obtuse. isosceles (i don't understand how to solve this problem)
28. ### Math

1. Name a pair of complementary angles. (1 point) 1 and 4 1 and 6 3 and 4 4 and 5 2. If m1=37°, what is m4? (1 point) 53° 43° 37° 27° 3. If m1 = 40°, what is m5? (1 point) 50° 40° 35° 25° Use the figure to answer questions 4–5. Assume that lines JL and MP are ...
29. ### geometry

Indirect proof given triangle ABC,<B is an obtuse angle prove there can only be one obtuse angle in triangle.
30. ### algebra 1

sketch, label and mark each figure. 1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute <H and the shorter diagonal. 3.Scalene right triangle SCA with midpoints L,M and N on SC, CA, and SA, respecitively. 4.Trapeoziod TRAP with TR|| A[, RE PA and P...
31. ### algebra 1

sketch, label and mark each figure. 1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute <H and the shorter diagonal. 3.Scalene right triangle SCA with midpoints L,M and N on SC, CA, and SA, respecitively. 4.Trapeoziod TRAP with TR|| A[, RE PA and P...
32. ### geometry

sketch label and mark each figure 1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute <H and the shorter diagonal. 3.Scalene right triangle SCA with midpoints L,M and N on SC, CA, and SA, respecitively. 4.Trapeoziod TRAP with TR|| A[, RE PA and P,E...
33. ### geometry.

sketch, label and mark each figure. 1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute <H and the shorter diagonal. 3.Scalene right triangle SCA with midpoints L,M and N on SC, CA, and SA, respecitively. 4.Trapeoziod TRAP with TR|| A[, RE PA and P...
34. ### Math

Write whether the statement is true or false. If false write a true statement. 1. A right triangle has three right angles. False a right triangle has 1 right angle 2. A triangle that has three sides of the same length is an equilateral triangle. True because all sides are ...
35. ### MATH

1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute <H and the shorter diagonal. 3.Scalene right triangle SCA with midpointsL<M and N on SC, CA, and SA, respecitively. 4.Trapeoziod TRAP with TR|| A[, RE PA and P,E and A collinear 5.KIte KITE ...
36. ### Math

True or false and if false write a true statement 1. A right triangle has three right angles. 2. A triangle that has three sides of the same length is an equilateral triangle. 3. An obtuse triangle has two angles that are acute. 4. In a right triangle the two angles that are ...
37. ### math

1. What is the correct classification for the triangle shown below? A triangle has two angles measuring 68 degrees and 22 degrees. (1 point) acute, scalene acute, isosceles --- right, scalene obtuse, scalene 2. What is the value of x in the triangle? A triangle has 2 congruent...
38. ### 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)?
39. ### 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)?
40. ### maths

ABC is an acute triangle with ∠BCA=35∘. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If AO=AH, what is the value of ∠ABC(in degrees)?
41. ### geometry

okay i have a few question... 1.Find the equation of a line through the points (-2, -5) and (-7, -5) 2. the three lengths 4, 6, 8, form a.not a triangle b.a right triangle c.an acute triangle d an obtuse triangel
42. ### math

List at least one way in which an acute triangle and an obtuse triangle are different.
43. ### Geometry Part 2

A triangle has side lengths 10,15,and 7.Is the triangle acute,obtuse,or right?Explain.
44. ### Geometry

Given the lengths of the sides of a triangle, identify the triangle as acute, right, or obtuse. 37,12,34 5,12,13 20,21,28
45. ### Math

Which triangle is not possible to construct? A a right isosceles triangle B an acute equilateral triangle C an obtuse scalene triangle D a right equilateral triangle This is the second time ive posted but the last thread got confusing
46. ### Geometry

Tell if the measures 9,11, and 7 can be side lengths of a triangle. if so, classify the triangle as acute, right, or obtuse?
47. ### Geometry

The lengths of three sides of a triangle are given. Describe each triangle as acute. right. or obtuse. 5, 6,10.
48. ### math

If the angles of a triangle arc in the ratio of 5:6:7, the triangle is Acute Obtuse Right Isosceles Equilateral
49. ### geometry

Suppose right triangle ABC has one acute angle 47º. Suppose also that right triangle DEF has an acute angle 43º. How are triangles ABC and DEF related?
50. ### Geometry

A triangle has side lengths of 4, 5, and 6. Which of the following correctly classifies this triangle. Acute, Right, Obtuse, Isosceles.
51. ### Geometry

Name the angle that is supplementary to <COD a.<COA B.<BOC C.<COB D.<BOA Classify the triangle with angles with the measures 33,90, and 57 as acute, right, or obtuse a.Acute b.Right c.Obtuse Sandra is making the shape of a rhombus the first three angles are 75, ...
52. ### math

I need to find out the type of triangle (by the type of angles). Is triangle acute, right or obtuse, when the lenghts of triangle sides are: a) 7, 8, 12 b) 20, 15, 40 c) 2/3, 8/9, 10/9
53. ### Algebra

If the length of one side of a triangle Is 2x - 1 units and the perimeter is 18 What is x? The equation isn't placed anywhere On the triangle and the triangle is just A regular one. It is not obtuse or acute
54. ### MATH

Which triangle is not possible to construct? A a right isosceles triangle B an acute equilateral triangle C an obtuse scalene triangle D a right equilateral triangle Would it be A
55. ### Math "Need Help Asap"!

Geometry Unit Practice Sheet Multiple Choice Use the figure to answer questions 1–3. 1. Name a pair of complementary angles. (1 point) 1 and 4 1 and 6 3 and 4 4 and 5 2. If m1=37°, what is m4? (1 point) 53° 43° 37° 27° 3. If m1 = 40°, what is m5? (1 point) 50° 40° 35...
56. ### Math

the following points are plotted on a coordinate plane (-1.2), (-1.7) and (4.2) if the points are connected by a straight line with shape will they form? A: an acute triangle B: a right triangle C: an obtuse triangle D:a quadrilateral
57. ### Geometry math

1: what is the correct classification for the triangle shown below? 1:acute, scalene<I pick this 2:acute, isosceles 3:right, scalene 4:obtuse, scalene 2:what is the value of x in the triangle? 1:38 2:71<I pick this 3:76 4:142 3:a right isosceles triangle has an angle ...
58. ### Math Ms. Sue please

9. Name the triangles that are classified by angles. (1 point) right, scalene, isosceles scalene, isosceles, equilateral acute, right, obtuse obtuse, isosceles, acute I chose the answer "scalene, isosceles, equilateral" but the correct answer is "acute, right, obtuse". Why is ...
59. ### Geometry

ABC is an obtuse triangle with m<A=21 and <C is acute. a)What is m<B+m<c? B)What is the range of whole numbers for m<C? C)What is the range of whole numbers for m<B?
60. ### Math

1. The lengths of the three sides of a triangle are given. Classify each triangle as acute, right, or obtuse. NUMBERS: 30, 40, 50. I'm confused by this question, could someone help/explain what it is asking.
61. ### Maths

A scalene triangle cd also be acute or rat angled or obtuse angle triangle .please say tru e or false Ans according to me is yes
62. ### geometry

Let the incircle of triangle $ABC$ be tangent to sides $\overline{BC}$, $\overline{AC}$, and $\overline{AB}$ at $D$, $E$, and $F$, respectively. Prove that triangle $DEF$ is acute. I have tried proving that triangle DEF's angles were les than the opposite angles in triangle ...
63. ### algebra 1

because i have to sketch, label and mark each figure. sketch, label and mark each figure. 1.Isoscles obtuse triangle TRI with vertex angle T. 2.Rhombus RHOM with acute <H and the shorter diagonal. 3.Scalene right triangle SCA with midpoints L,M and N on SC, CA, and SA, ...

Which of the statements is ALWAYS TRUE? A-A right triangle is a scalene triangle. B-An equilateral triangle is an isosceles triangle. C-An isosceles triangle is an obtuse triangle. D-A right triangle is an acute triangle. I got either A or D. I don't know. Also, if angle A is ...
65. ### math

classify the triangle as acute right obtuse 3,5,radical 34
66. ### geometry

A triangle has side lengths of 14 cm, 48 cm, and 50 cm is it acute, obtuse, or right
67. ### Math

Triangle ABC is an obtuse triangle with two congruent angles. If m< C = 108 write an expression that represents m<A
68. ### Geometry

Let ABC be any triangle. Equilateral triangles BCX, ACY, and BAZ are constructed such that none of these triangles overlaps triangle ABC. a) Draw a triangle ABC and then sketch the remainder of the figure. It will help if (triangle) ABC is not isosceles (or equilateral). b) ...
69. ### geometry

Classify the triangle as right, acute, or obtuse if the measures of its sides are 28, 46, and 53.
70. ### geometry

A triangle has side lengths of 18 cm, 80 cm, and 81 cm. Classify it as acute, obtuse, or right
71. ### Geometry

A triangle has side lengths of 18 cm, 80 cm, and 81 cm. Classify it as acute, obtuse, or right.
72. ### geometry

classify a triangle with side lengths 5, 9 and 12 as acute, right, or obtuse
73. ### pre algebra

the measures of the angles of (triangle) RST are in the ratio 2:3:5. find the measures of each, and classify the triangle as acute, right, obtuse.
74. ### HELP!!!!RIGHT NOW!!!!

Which set of side lengths shows similar triangles? (1 points) A) Triangle ABC : 40, 20, 50; Triangle XYZ: 10, 4, 8 B) Triangle ABC : 30, 20, 60; Triangle XYZ: 40, 60, 90 C) Triangle ABC : 110, 80, 60; Triangle XYZ: 6, 8, 5.5 D) Triangle ABC : 32, 20, 32; Triangle XYZ: 30, 16, 16
75. ### math

classify the triangle as a scalene,isoceles or equilateral and acute right or obtuse
76. ### Math need help!

If the angles can form a triangle, classify it as acute, obtuse or right. 15°, 60°, 95°
77. ### Converse of the Pythagorean Theorem

Can you please help me and my grandson? It says: The length of the sides of the triangle are 5m, 6m, and 7m. Is the triangle acute, right, obtuse? How can I check my answer to see if it was right?
78. ### geometry

the sum of the measures of an obtuse angle and acute angle is 12 degrees.the complement of the acute angle and one-half the suplement of the obtuse angle is 75 degree.find the measures of the two angles.
79. ### math

The vertices of a triangle are listed below. H(-2,4), I(22,4), J(10,-1) Which of the following correctly classifies the triangle? 1.The triangle is an obtuse isosceles triangle. 2.The triangle is a right scalene triangle. 3.The triangle is an obtuse scalene triangle. 4.The ...
80. ### college math

Classify the triangle as scalene isoceles or equlateral and as acute, right or obtuse
81. ### Math

Hello its T.J I changed my name. If the angles can form a triangle, classify it as acute, obtuse or right. 15°, 60°, 95°
82. ### Math

Which set of side lengths shows similar triangles? Triangle ABC : 40, 20, 50; Triangle XYZ: 10, 12.5, 10 Triangle ABC : 30, 20, 30; Triangle XYZ: 40, 30, 20 Triangle ABC : 110, 80, 60; Triangle XYZ: 12, 16, 22 Triangle ABC : 32, 20, 32; Triangle XYZ: 40, 26, 26
83. ### angle measurements HELP ME PLZ QUICKLY!!!

name the type or triangle with angle measurements of 30 degrees , 60 degrees, and 90 degrees. A. a acute triangle B. a equilateral triangle C. right triangle D. a Obtuse ( I think its a right am I right? btw I no what this triangle would look like thought u should no!)
84. ### math

4. Name a pair of corresponding angles. (1 point) 1 and 6 2 and 6 3 and 5 4 and 5 5. if m <4 = 105° then what is the m<8 105 75 175 25 6. ACB is congruent to which angle? (1 point) ZYX XYZ XZY YXZ 7.Side CA is congruent to which side? (1 point) ZX YX XY YZ 8.Translate ...
85. ### Math

Triangle ABC is an acute triangle. If all angles are measured to the hundredths,what is the smallest angle measurement?
86. ### geometry

Suppose a triangle has side lengths of 6, 7, and 10. What best describes it? Acute, right, obtuse, or not enough information?
87. ### Math help plz check my answers!

11. Name the triangles that are classified by sides. right, scalene, isosceles scalene, isosceles, equilateral*** acute, right, obtuse obtuse, isosceles, acute
88. ### math

name the triangles that are classified by sides. a. right, scalene, isosceles b.scalene, isosceles, equilateral c.acute, right, obtuse d.obtuse, isosceles, acute -Hinata-chan
89. ### geometry

The lengths of three sides of a triangle are given. Describe each triangle as acute. right. or obtuse. square root 5, 3, square root 14.
90. ### Math question

Name the triangles that are classified by angles. right, scalene, isosceles scalene, isosceles, equilateral acute, right, obtuse obtuse, isosceles, acute
91. ### trigonometry

In the triangle ABC, the sides AB and BC have lengths 7cm and 8cm respectively, and angle B is obtuse. the area of the triangle is 14 root 3 cm^2. Find a.The size of angle B b. The length of AC
92. ### Math help, anyone?

11. Name the triangles that are classified by sides. right, scalene, isosceles scalene, isosceles, equilateral acute, right, obtuse obtuse, isosceles, acute
93. ### geometry

The medial triangle of a triangle ABC is the triangle whose vertices are located at the midpoints of the sides AB, AC, and BC of triangle ABC. From an arbitrary point O that is not a vertex of triangle ABC, you may take it as a given fact that the location of the centroid of ...
94. ### maths

DRAW LOCUS OF POINT SO THAT IT IS EQUIDISTANT FROM BC & CA . ... constructed such that none of these triangles overlaps triangle ABC. a) Draw a triangle ABC and then sketch ... 16) AB = 3.2cm BC = 8.4cm The area of the triangle ABC is 10cm². ... CONSTRUCT ANGLE ABC WHERE AB=...
95. ### Math 8th

How could I solve this? Multiple Choice Classify the triangle according to side length and angle measurement. A right triangle A. isosceles; right B. equilateral; obtuse C. scalene; acute D. scalene; right
96. ### Geometry

Write an indirect proof that an obtuse triangle does not have a right angle. Given: Triangle RST is an obtuse triangle. Prove: Triangle RST does not have a right angle. Let angle S be an obtuse angle. Assume Triangle RST has a right angle. Let angle R be a right angle. Use ...