Area of 2D Figures

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 × base × height

Front

What is the formula for the perimeter of a triangle?

Back

Perimeter = side1 + side2 + side3

Front

What is the formula for the area of a rectangle?

Back

Area = length × width

Front

What is the formula for the perimeter of a rectangle?

Back

Perimeter = 2 × (length + width)

Front

What is the formula for the area of a circle?

Back

Area = π × radius²

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2 × π × radius

Front

What is the difference between area and perimeter?

Back

Area measures the space inside a shape; perimeter measures the distance around a shape.

Front

What is the formula for the area of a parallelogram?

Back

Area = base × height

Front

What is the formula for the area of a trapezoid?

Back

Area = 1/2 × (base1 + base2) × height

Front

What is a 3-D shape?

Back

A shape that has depth, width, and height, such as a cube or sphere.