Geometry Ch 8.1-8.6

Front

What is the formula for the area of a circle?

Back

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

Front

How do you find the area of a shaded region between two concentric circles?

Back

Area of shaded region = Area of larger circle - Area of smaller circle.

Front

What is the area of a circle with a radius of 12 cm?

Back

Area = π(12)² = 144π cm².

Front

What is the area of a circle with a radius of 9 cm?

Back

Area = π(9)² = 81π cm².

Front

How do you calculate the area of a kite?

Back

Area = (d1 * d2) / 2, where d1 and d2 are the lengths of the diagonals.

Front

What is the area of a kite with diagonals of length 10 cm and 8 cm?

Back

Area = (10 * 8) / 2 = 40 cm².

Front

What is the formula for the area of a parallelogram?

Back

Area = base * height.

Front

What is the area of a parallelogram with a base of 10 cm and a height of 5 cm?

Back

Area = 10 * 5 = 50 cm².

Front

How do you find the area of a composite figure?

Back

Break the figure into simpler shapes, calculate the area of each, and sum them up.

Front

What is the area of a composite figure with areas of 30 cm² and 31 cm²?

Back

Area = 30 + 31 = 61 cm².