Area of 2D shapes

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius of the circle.

Front

What is the area of a triangle?

Back

Area = 1/2 × base × height.

Front

How do you calculate the area of a rectangle?

Back

Area = length × width.

Front

What is the area of a square?

Back

Area = side², where side is the length of one side of the square.

Front

What is the formula for the area of a trapezoid?

Back

Area = 1/2 × (base1 + base2) × height.

Front

If a circle has a diameter of 8 meters, what is its radius?

Back

Radius = diameter / 2 = 4 meters.

Front

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

Back

Area = π(5)² ≈ 78.54 cm².

Front

How do you find the area of a parallelogram?

Back

Area = base × height.

Front

What is the area of a triangle with a base of 6 cm and a height of 4 cm?

Back

Area = 1/2 × 6 × 4 = 12 cm².

Front

What is the area of a rectangle with a length of 10 cm and a width of 5 cm?

Back

Area = 10 × 5 = 50 cm².