7th Grade Area Flashcard Corrections

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

How do you calculate the area of a trapezoid?

Back

Area = (1/2) × (Base1 + Base2) × height.

Front

What is the formula for the area of a triangle?

Back

Area = (1/2) × base × height.

Front

What is the formula for the area of a circle?

Back

Area = π × radius².

Front

If a rectangle has a length of 32 feet and a width of 24 feet, what is its area?

Back

Area = 32 ft × 24 ft = 768 square feet.

Front

What is the area of a circle with a radius of 5 cm?

Back

Area = π × (5 cm)² = 78.5 square cm.

Front

What is the cost of carpeting a room that measures 32 feet by 24 feet at $3 per square foot?

Back

Cost = Area × cost per square foot = 768 square feet × $3 = $2,304.

Front

What is the area of a triangle with a base of 15 feet and a height of 9.5 feet?

Back

Area = (1/2) × 15 ft × 9.5 ft = 71.25 square feet.

Front

What is the area of a trapezoid with bases of 10 in and 14 in, and a height of 6 in?

Back

Area = (1/2) × (10 in + 14 in) × 6 in = 72 square in.