Isosceles and Equilateral Triangles

What is the measure of each angle in an equilateral triangle?

• 45 degrees

• 90 degrees

• 120 degrees

• 60 degrees

In an isosceles triangle, if one of the base angles is 45 degrees, what is the measure of the third angle?

• 60 degrees

• 30 degrees

• 90 degrees

• 45 degrees

If the measure of one angle in an isosceles triangle is 70 degrees, what is the measure of the other two angles?

• 70 degrees

• 90 degrees

• 60 degrees

• 100 degrees

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

• 180 degrees

• 120 degrees

• 270 degrees

• 90 degrees

In an isosceles triangle, if one of the angles is 60 degrees, what is the measure of the other two angles?

• 60 degrees

• 30 degrees

• 120 degrees

• 90 degrees

If the measure of one angle in an equilateral triangle is 60 degrees, what is the measure of the other two angles?

• 90 degrees

• 120 degrees

• 60 degrees

• 45 degrees

What is the relationship between the sides of an equilateral triangle?

• Two sides are equal

• All sides are equal

• No sides are equal

• Only one side is equal

In an isosceles triangle, if one of the angles is 80 degrees, what is the measure of the other two angles?

• 100 degrees

• 50 degrees

• 90 degrees

• 30 degrees

What is the measure of each base angle in an isosceles triangle if the vertex angle is 100 degrees?

• 40 degrees

• 90 degrees

• 60 degrees

• 120 degrees

What is the definition of an isosceles triangle?

• A triangle with three equal sides.

• A triangle with two equal sides.

• A triangle with two acute angles.

• A triangle with no equal sides.