Exploring Isosceles and Equilateral Triangles

What is a key property of an isosceles triangle?

• All sides are equal

• Two sides are equal

• All angles are equal

• It has a right angle

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

• 90 degrees

• 40 degrees

• 50 degrees

• 70 degrees

Tags

CCSS.8.G.A.5

If the legs of an isosceles triangle are 2x + 6 and 3x - 6, what is the value of x?

• 6

• 12

• 24

• 18

Tags

CCSS.HSG.SRT.B.4

In an isosceles triangle, if the vertex angle is 90 degrees, what are the measures of the base angles?

• 90 degrees each

• 30 degrees each

• 45 degrees each

• 60 degrees each

Tags

CCSS.8.G.A.5

What is a key property of an equilateral triangle?

• Two sides are equal

• It has a right angle

• All sides are equal

• All angles are different

Tags

CCSS.4.G.A.2

In an equilateral triangle, what is the measure of each angle?

• 30 degrees

• 45 degrees

• 60 degrees

• 90 degrees

Tags

CCSS.8.G.A.5

If 6x equals 60 in an equilateral triangle, what is the value of x?

• 20

• 15

• 10

• 5

Tags

CCSS.HSG.CO.C.11

In an equilateral triangle, if one side is labeled as 6x - 5 and another side as 5x, what is the value of x?

• 4

• 7

• 5

• 6

Tags

CCSS.HSG.CO.C.11

If 3x equals 60 in an equilateral triangle, what is the value of x?

• 10

• 15

• 20

• 25

Tags

CCSS.8.G.A.5

In an equilateral triangle, if 4x equals 40, what is the value of x?

• 5

• 10

• 20

• 15

Tags

CCSS.8.G.A.5