Free Printable 4.12 Checkpoint

1.

Choose the formula you would need for the following problem:

Bob wants to place flowers around the edge of his circular porch.

a)

CIRCUMFERENCE

b)

AREA

2.

Choose the formula you would need for the following problem:

The cheese and sauce on a pizza.

a)

CIRCUMFERENCE

b)

AREA

3.

Choose the formula you would need for the following problem:

carpeting a circular room

a)

CIRCUMFERENCE

b)

AREA

4.

$A=\pi r^2$

Which shows how you would find the area of this circle?

a)

$A=2\cdot3.14\cdot14$

b)

$A=3.14\cdot28$

c)

$A=3.14\cdot14\cdot2$

d)

$A=3.14\cdot14$

e)

$A=3.14\cdot14\cdot14$

5.

$A=\pi r^2$

Which shows how you would find the area of this circle?

a)

$A=2\cdot3.14\cdot8$

b)

$A=3.14\cdot16$

c)

$A=3.14\cdot8\cdot2$

d)

$A=3.14\cdot8$

e)

$A=3.14\cdot8\cdot8$

6.

Which formula do you need to find the AREA of this circle?

a)

$A=\pi d$

b)

$A=2\pi r$

c)

$A=\pi\cdot r\cdot2$

d)

$A=\pi r^2$

7.

To find the area of this circle, which formula would you use?

a)

$A=\pi\cdot14^2$

b)

$A=\pi\cdot7^2$

8.

How can you find the RADIUS of this circle?

a)

Multiply by 2 (double the diameter)

b)

Divide by 2 (half the diameter)

9.

What is the area of this circle? (Enter the numbers only! And make sure there are no extra 0's at the end of your decimal!)

(a)

10.

What is the area of this circle? (Enter the numbers only! And make sure there are no extra 0's at the end of your decimal!)

(a)

4.12 Checkpoint - Area of Circles

Total questions: 10

Worksheet time: 18mins

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