Isosceles and Equilateral Triangles

Find the value of y

• 100

• 180

• 40

• 50

Find the value of y.

• 180

• 19

• 9

• 4.5

Find the value of x

• 90

• 180

• 45

• 15

Find the value of x

• 18

• 180

• 25

• 30

Find the value of y.

• $114\degree$

• $66\degree$

• $48\degree$

• $24\degree$

Find the value of x

• 41

• 45

• 31

• 98

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°

Which of the following angles can you add together to equal angle d? 

• Angle a and Angle b

• Angle b and Angle c

• Angle a and Angle c

• Angle a and Angle b and Angle c

What is the measure of angle b?

• 36^o

• 56^o

• 63^o

• 117^o