Isosceles Triangle Base Theorem

Find the value of the base angle. 

• 30
• 120
• 60
• 180

Find the value of x.

• 35º
• 70º
• 110º
• 145º

• 72
• 67
• 65
• 54

Which segment is the base?

• Segment AB
• Segment BC
• Segment AC

Which sides are congruent?

• AB and AC

• AB and BC

• AC and BC

• ABC and ACB

• 72
• 67
• 65
• 54

Use the picture to answer the question.

• 30
• 60
• 15
• 120

Which angle is the vertex angle?

• <C
• <A
• <B

What is the value of x?

• 51
• 49
• 78

• 93
• 71
• 81
• 55