Find Area and Perimeter of Shapes

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 triangle?

Back

Area = 1/2 × base × height.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2 × π × radius.

Front

What is the formula for the area of a circle?

Back

Area = π × radius².

Front

If the radius of a circle is 3 feet, what is the circumference?

Back

Circumference = 2 × π × 3 ≈ 18.85 feet.

Front

If a rectangle has an area of 50 square meters and a width of 5 meters, what is the length?

Back

Length = Area / Width = 50 / 5 = 10 meters.

Front

What is the definition of perimeter?

Back

Perimeter is the total distance around the outside of a shape.

Front

What is the definition of area?

Back

Area is the amount of space inside a 2D shape.

Front

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

Back

Area = 1/2 × 10 × 5 = 25 square meters.