11-0 Area of 2D Shapes

find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm

Answer explanation

The correct answer is 28.26 cm because the formula for the area of a circle is A = πr^2, and with a radius of 3 cm, the area is 3.14 * 3^2 = 28.26 cm.

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

Answer explanation

To find the area of a circle, use the formula A = πr^2. Given the radius, calculate A = π(9^2) = 254.34. Therefore, the correct answer is 254.34.

The radius is....

• a line that crosses through the center and touches each edge 

• the center point of a circle 

• a line from the center point to the edge of the circle

• an element in science

Answer explanation

The radius is a line from the center point to the edge of the circle, which is the correct choice among the options provided.

A line that goes from one end of the circle to the other and crosses the center point.  

• center

• diameter

• dime eater

• radius

Answer explanation

A diameter is a line that goes from one end of the circle to the other and crosses the center point, making it the correct choice.

What is the area of this circle?

• 6082.12

• 1520.53

• 1893.14

• 1292.92

Answer explanation

The correct answer is 1520.53 because the area of a circle is calculated using the formula A = πr^2, where r is the radius provided in the question.

If the diameter of a circle is 50 yards, the radius is _____

• 100 yards

• 25 yards

• 150 yards

• 15 yards

Answer explanation

To find the radius, divide the diameter by 2. Therefore, the radius is 50 yards / 2 = 25 yards. Hence, the correct answer is 25 yards.

• 36 sq. cm

• 6 cm

• 24 sq. cm

• 12 sq. cm

Determine the area of the shaded region. Make sure you add sq.ft. to your answer.

Determine the area of the shaded region.

Which figure has the greatest area?

• A

• B

• C

Answer explanation

Figure A has the greatest area as it appears to have the largest size among the given figures.