Equilateral and Isosceles Triangles Practice

What is the measure of ∠S?

• 60⁰

• 52⁰

• 45⁰

• 36⁰

What is the measure of BC?

• 12

• 6

• not enough information

• 10

What is the value of x?

• 16

• 60

• 8

• not enough information

What is the measure of ∠S?

• not enough information

• 30

• 60

• 180

Find x

• 90

• 45

• 22

• 35

Find x

• 3

• 4

• 2

• 10

Find the value of x

• 41

• 45

• 31

• 98

What do the angles in an equilateral triangle measure?

• 30, 60, 90

• 60, 60, 60

• 45, 45, 90

• 35, 55, 90

If two sides of a triangle are congruent, then the _________________ opposite those sides are congruent.

• sides

• vertices

• angles

• measures

If an isosceles triangle has a base angle measuring 40°, then what measure is the vertex angle?

• 120°

• 100°

• 40°

• 80°