Triangle XYZ is shown.

Which triangle must be similar to triangle XYZ ?

A.) a triangle with two angles that measure 40°

B.) a triangle with angles that measure 40° and 60°

C.) a scalene triangle with only one angle that measures 100°

D.) an isosceles triangle with only one angle that measures 40°

A.) a triangle with two angles that measure 40°

B.) a triangle with angles that measure 40° and 60°

C.) a scalene triangle with only one angle that measures 100°

D.) an isosceles triangle with only one angle that measures 40°

**Two triangles are similar if their corresponding angles are congruent and the corresponding sides are**

in proportion.

in proportion.

If a triangle was to be similar to triangle XYZ, it would surely have equal angles. If two angles on the new triangle

measured 40°, each, then the third angle would have to be 100°, since angles of a triangle add up to 180°.

Therefore, the correct answer would be:

**A.) a triangle with two angles that measure 40°**

**Ask Algebra House**