Lesson 4-2: Equilateral & Isosceles Triangles

Which angle is the vertex angle?

• <C

• <A

• <B

Which segment is the base?

• Segment AB

• Segment BC

• Segment AC

Find the value of x.

• 90

• 45

• 22

• 35

Find the value of x.

• 1

• 4

• 5

• 8

Find the value of y.

y = (a)  

What is the measure of ∠A?

• 46

• 134

• 90

• 88

What is the measure of ∠T?

SOLVE FOR X AND PLUG X BACK INTO ANGLE T.

• 4

• 52

• 76

• 25

What is the value of y?

y = (a)  

What is the measure of ∠D? SOLVE FOR X AND PLUG X BACK INTO ANGLE D.

D = (a)  

Find x if Triangle ABC is an equilateral triangle.

• 2

• 4

• 6

• 8