Name:    Try It Out -- Chapter 5, Lesson 5

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

1.

The formula for the area, A, of a circle with radius r is:
 a. A = 2pr2 b. A = pr c. A = pr2

2.

Select the term to complete the sentence.

“To determine the amount of sod required to sod a circular green on a golf course, calculate the _____ of the green.”
 a. circumference c. diameter b. radius d. area

3.

Select the term to complete the sentence.

“To determine the amount of glass required for a circular opening for a window, calculate the ____ of the opening.”
 a. diameter c. circumference b. area d. radius

4.

Determine the area of a circle that has a radius of 4.7 cm.
 a. 277.59 cm2 b. 69.4 cm2 c. 29.53 cm2

5.

Determine the area of a circle that has a diameter of 15.8 m.
 a. 196.1 m2 b. 784.27 m2 c. 49.64 m2

6.

The circumference of a circle is 25 cm. Determine the area of the circle to the nearest centimetre.
 a. 25 cm2 c. 1964 cm2 b. 199 cm2 d. 50 cm2

7.

Select the correct procedure to solve this problem.

Determine the area of the shaded region.

{Diagram - the same as the diagram for Question 10 for Chapter 5.5}
 a. Determine the area of the circle, then subtract the area of the square from the area of the circle to find the area of the shaded region. b. Determine the area of the square. Find the area of the circle. Add the area of the square and area of the circle to find the area of the shaded region. c. Determine the area of the square. Find the area of the circle. Subtract the area of the circle from the area of the square to find the area of the shaded region. d. With the information provided, it is not possible to find the area of the shaded region.

8.

The diameter of a DVD is 12.0 cm. The diameter of the hole in the centre is 1.5 cm.  Find the area of the paper needed for the DVD label.
 a. 445.32 cm2 c. 113.10 cm2 b. 111.34 cm2 d. 459.46 cm2

9.

A circular pool has a concrete walkway around the outside of the pool. The concrete walkway is 1.5 m wide. The diameter of the pool and walkway together is
23m. Determine the area of the pool cover (The pool cover does not cover the walkway.)
 a. 363.1 m2 c. 62.83 m2 b. 530.93 m2 d. 314.2 m2

10.

Tracy is making decorations for her room.  She cuts two circles from a rectangular piece of paper as shown.  How much paper is she wasting?

{Use the same diagram as for Question 12 in Chapter 5.5 of manuscript.Replace the 2 cm with 21.6 cm, and replace 4 cm with 43.2 cm}
 a. 200.25 cm2 c. 933.12 cm2 b. 732.87 cm2 d. 1998.36 cm2