Isosceles Triangle

Which of the following is a property of isosceles triangles?

• Two sides of equal length

• One side of equal length

• Three sides of equal length

• No sides of equal length

What is the sum of the angles in an isosceles triangle?

• 270

• 360

• 180

• 90

Tags

CCSS.8.G.A.5

Which theorem states that the base angles of an isosceles triangle are congruent?

• Base Angles Theorem

• Pythagorean Theorem

• Angle Sum Theorem

• Law of Sines

Tags

CCSS.8.G.B.8

What is the measure of the vertex angle of an isosceles triangle if the base angles are 70 degrees?

• 40 degrees

• 30 degrees

• 45 degrees

• 90 degrees

Tags

CCSS.8.G.A.5

In an isosceles triangle, if one of the base angles is 40 degrees, what is the measure of the vertex angle?

• 60

• 100

• 120

• 80

Tags

CCSS.8.G.A.5

In an isosceles triangle, if one of the base angles is 70 degrees, what is the other base angle?

• 50

• 70

• 60

• 40

Tags

CCSS.8.G.A.5

Find the missing angle indicated.

• 53

• 97

• 30

• 20

Tags

CCSS.8.G.A.5

What is the measure of angle b?

• 36^o

• 56^o

• 63^o

• 117^o

Tags

CCSS.8.G.A.5

What is the value of x?

• 10

• 5

• -12

• 9

Tags

CCSS.8.G.A.5

• 35

• 70

• 72.5

• 110

Tags

CCSS.8.G.A.5