Unit Test — Unit test Answers
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A regular pentagon is created using the bases of five congruent isosceles triangles, joined at a common vertex.
A
54°B
72°C
108°D
144°22
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Point X is the circumcenter of ΔABC.What is the length of XB?
A
4.2 cmB
4.6 cmC
4.8 cmD
5.3 cm23
In ΔXYZ, m∠X = 90° and m∠Y = 30°. In ΔTUV, m∠U = 30° and m∠V = 60°. Which is true about the two triangles?
A
ΔXYZ ≅ ΔTUVB
ΔXYZ ≅ ΔVUTC
No congruency statement can be made because only two angles in each triangle are known.D
No congruency statement can be made because the side lengths are unknown.24
If isosceles triangle ABC has a 130° angle at vertex B, which statement must be true?
A
m∠A = 15° and m∠C = 35°B
m∠A + m∠B = 155°C
m∠A + m∠C = 60°D
m∠A = 20° and m∠C = 30°25
Triangle A B C is shown with its exterior angles. Line C B extends through point D. Line B C extends to form exterior angle that is 135 degrees. Angle C A B is 75 degrees.
A
m∠ABC = 15°B
m∠ABC = 45°C
m∠ABC = 60°D
m∠ABC = 75°Did you find these answers helpful?
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