Isosceles and Equilateral Triangle Theorems

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

Use the picture to answer the question.

• 76
• 28
• 152
• 56

Find x

• 3
• 4
• 2
• 10

Find x

• 10
• 32
• 116
• 16

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

Find the measure of angle A.

• 30 degrees
• 160 degrees
• 140 degrees
• 32 degrees

Find x

• 60
• 48
• 30
• 28

Solve for x.

• 7
• 9
• 10
• -11