Unit 10 Area Review

Front

What is the formula for the area of a rectangle?

Back

Area = 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 area of a circle?

Back

Area = π × radius².

Front

How do you calculate 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

If a rectangle has a length of 10 cm and a width of 5 cm, what is its area?

Back

Area = 10 cm × 5 cm = 50 cm².

Front

If a triangle has a base of 8 cm and a height of 5 cm, what is its area?

Back

Area = 1/2 × 8 cm × 5 cm = 20 cm².

Front

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

Back

Area = π × (3 cm)² ≈ 28.27 cm².

Front

If a parallelogram has a base of 6 m and a height of 4 m, what is its area?

Back

Area = 6 m × 4 m = 24 m².

Front

What percentage of a circle is shaded if 90° of a 360° circle is shaded?

Back

Percentage shaded = (90° / 360°) × 100% = 25%.