Area and Perimeter of Triangles

Front

What is the definition of a triangle?

Back

A triangle is a three-sided polygon.

Front

What are the types of triangles based on side lengths?

Back

The types are equilateral, isosceles, and scalene.

Front

What is an equilateral triangle?

Back

An equilateral triangle has all three sides of equal length.

Front

What is an isosceles triangle?

Back

An isosceles triangle has two sides of equal length.

Front

What is a scalene triangle?

Back

A scalene triangle has all sides of different lengths.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

If a triangle has a base of 10 ft and a height of 5 ft, what is its area?

Back

Area = 1/2 * 10 * 5 = 25 ft².

Front

What is the formula for the perimeter of a triangle?

Back

Perimeter = side1 + side2 + side3.

Front

If a triangle has sides of 5 in, 7 in, and 6 in, what is its perimeter?

Back

Perimeter = 5 + 7 + 6 = 18 in.

Front

What is a right triangle?

Back

A right triangle has one angle that measures 90 degrees.