Area of 2D Shapes Exit Ticket

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 relationship between the radius and diameter of a circle?

Back

The radius is 1/2 of the diameter.

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius.

Front

What is the formula for the area of a trapezoid?

Back

Area = 1/2 h(b₁ + b₂), where h is the height and b₁ and b₂ are the lengths of the two bases.

Front

What is the area of a rectangle?

Back

Area = length x width.

Front

What is the area of a triangle?

Back

Area = 1/2 base x height.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

If the radius of a circle is 9 inches, what is the diameter?

Back

Diameter = 2 x radius = 2 x 9 = 18 inches.

Front

What is the area of a square with a side length of 5 cm?

Back

Area = side x side = 5 cm x 5 cm = 25 cm².

Front

What is the area of a trapezoid with bases of 10 cm and 6 cm, and a height of 4 cm?

Back

Area = 1/2 x 4 x (10 + 6) = 32 cm².