Equilateral and Isosceles Triangle

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°.

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length and the angles opposite those sides are equal.

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°.

Front

If two angles of a triangle are equal, what type of triangle is it?

Back

It is an isosceles triangle.

Front

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

Back

Each angle measures 60°.

Front

How do you find the height of an equilateral triangle?

Back

The height can be found using the formula: height = (√3/2) * side length.

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 also equal.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

If the base of an isosceles triangle is 10 cm and the height is 8 cm, what is the area?

Back

Area = 1/2 * 10 * 8 = 40 cm².

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides.