Isosceles and Equilateral Triangles

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is an equilateral triangle?

Back

A triangle where all three sides are of equal length and all three angles are 60 degrees.

Front

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

Back

180 degrees.

Front

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

Back

Isosceles triangle.

Front

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

Back

60 degrees.

Front

How do you find the length of a side in an isosceles triangle given the base and height?

Back

Use the Pythagorean theorem.

Front

What is the relationship between the angles in an equilateral triangle?

Back

All angles are equal and measure 60 degrees.

Front

If one angle of an isosceles triangle is 36 degrees, what are the measures of the other two angles?

Back

72 degrees each.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

What is the difference between an isosceles triangle and a scalene triangle?

Back

An isosceles triangle has at least two equal sides, while a scalene triangle has all sides of different lengths.