Isosceles and Equilateral Triangles

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all three angles are equal to 60 degrees.

Front

What is the formula for the perimeter of an equilateral triangle?

Back

The perimeter of an equilateral triangle is given by P = 3a, where 'a' is the length of one side.

Front

If the side length of an equilateral triangle is 24, what is its perimeter?

Back

The perimeter is 72 (P = 3 * 24).

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of any triangle is always 180 degrees.

Front

In an isosceles triangle, if the base angles are 36 degrees, what is the measure of the vertex angle?

Back

The vertex angle is 108 degrees (180 - 36 - 36).

Front

What is the relationship between the sides and angles in an isosceles triangle?

Back

In an isosceles triangle, the angles opposite the equal sides are equal.

Front

If triangle ABC is isosceles with AB = AC, what can be said about angles B and C?

Back

Angles B and C are equal.

Front

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

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

If the length of one side of an equilateral triangle is 8, what is the perimeter?

Back

The perimeter is 24 (P = 3 * 8).