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Lesson: Identifying Similar Triangles

When two triangles have the same shape but different size, they are called similar triangles. In this lesson, we will study postulates and theorems to learn how to use them to identify and prove that triangles are similar.

Worksheet: Identifying Similar Triangles • 22 Questions

Q1:

Which of the following properties is enough to conclude that two triangles are similar?

AThey have the same measure of angles.
BOne corresponding side and one corresponding angle are equal.
CThey both contain a right angle.
DAll corresponding angles have the same ratio.
ETwo corresponding sides have the same ratio.

Q2:

Two triangles are similar. What will be true of the lengths of the corresponding sides of both triangles?

A They will be in a constant ratio.
B They will be equal.
C Only two corresponding sides will be equal.
D If the angles are equal, the sides will be equal.

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