Area of Simple Shapes

Front

What is the formula for the area of a circle?

Back

Area = π × r², where r is the radius.

Front

What is the value of π (pi) approximately?

Back

π is approximately 3.14.

Front

How do you find the radius of a circle if you know the diameter?

Back

Radius = Diameter ÷ 2.

Front

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

Back

Area = Length × Width = 10 cm × 5 cm = 50 cm².

Front

What is the area of a triangle?

Back

Area = 1/2 × base × height.

Front

If a triangle has a base of 4 cm and a height of 3 cm, what is its area?

Back

Area = 1/2 × 4 cm × 3 cm = 6 cm².

Front

What is the area of a square with a side length of 6 cm?

Back

Area = side × side = 6 cm × 6 cm = 36 cm².

Front

What is the difference between radius and diameter?

Back

Radius is half the diameter; Diameter = 2 × Radius.

Front

How do you calculate the area of a parallelogram?

Back

Area = base × height.

Front

What is the area of a circle with a radius of 3 cm?

Back

Area = π × (3 cm)² ≈ 28.26 cm².