Area and Circumference of Circles and Composite Figures

Find the radius of the circle.

• 9

• 18

• 36

• 56.52

The perimeter of a circle is usually called the...

• radius

• diameter

• circumference

• area

The area of the circle would be found using which of the following formulas...  (9 cm is the radius)

• Area = π(4.5)²

• Area = π(9)²

• Area = π(18)²

• None of these

What is the area of this circle? Use the pi function on the calculator. Round your answer to two decimal places.

• 82.13

• 78.54

• 314.16

• 170.12

Find the area of the figure shown.

• 34 units²

• 960 units²

• 220 units²

• 480 units²

Find the area of the composite figure

• 40

• 9

• 49

• 61

If my radius is 10ft, what is my diameter?

• 20ft

• 5ft

• 31.4ft

• 62.8ft

Find the perimeter

• 14 m

• 43.96m

• 176 m

• 191.96 m

Look at the composite figure. How could you find the perimeter of the figure?

• Add the four side lengths shown in the diagram.

• Divide the figure into two rectangles. Find the perimeter of each rectangle. Add the two perimeters.

• Find the two missing side lengths and add them to the four side lengths shown in the diagram.

• Multiply the four side lengths shown in the diagram.

Look at the figure below.  What method could be used to find the area of the two-dimensional figure?

• Find the area of the trapezoid, find the area of the rectangle, and then subtract the areas.

• Find the area of the trapezoid, find the area of the rectangle, and then multiply the areas.

• Find the area of the trapezoid, find the area of the rectangle, and then divide the areas.

• Find the area of the trapezoid, find the area of the rectangle, and then add the areas.