Free Printable Circles and Triangles

Worksheets

Circles and Triangles

Total questions: 22

Worksheet time: 4hrs 58mins

Name

Class

Date

Radius: goes from the (a) to any (b) on a circle.

Choose from the below words

center

point

edge

radius

diameter

circumference

Diameter: passes through the (a) and touches (b) on the circle.

Choose from the below words

center

two points

radius

one point

chord

three points

arc

The radius is (a) the diameter.

The diameter is (b) the radius.

Choose from the below words

equal to

one-third

one half

twice

Circumference is the (a) a circle.

Choose from the below words

area inside

diameter across

radius through

distance around

$\pi=$ (a) $\div$ (b)

Choose from the below words

circumference

diameter

radius

chord

Select ALL equations that can be used to find the area of a circle.

$A=\pi r^2$

$A=\pi\cdot r\cdot r$

$A=2\pi r$

$A=\pi d$

Area of a Circle = The space (a) a circle.

Choose from the below words

inside

outside

above

below

around

Select ALL equations that could be used to find the circumference of a circle.

$C=\pi d$

$C=2\pi r$

$C=\pi r^2$

$C=\frac{1}{2}bh$

Amanda purchased a circular pool cover with a diameter of 30 feet. Rounded to the nearest whole number, which pool area would the cover best fit over?

94 ft²

47 ft²

707 ft²

2826 ft²

10.

The diameter of a circular pond is 18.7 meters. The circumference is approximately 58.7 meters. Which of these could be used to estimate the value of π?

A. d/c = π

B. c/d = π

C. π/c = d

D. d/π = c

11.

Mary measured a circular lid and found d, the diameter, was 5 inches and C, the circumference, was 15.5 inches. Which expression represents an approximate value for π?

5 ÷ 15

5 × 15

15 ÷ 5

15 × 5

12.

Which of the following choices is closest to the area of the circle?

A. 253.34 cm²

B. 63.59 cm²

C. 56.52 cm²

D. 28.26 cm²

13.

The diameter of a circular table is 16 feet. Which of the following represents the number of feet it would take to go around the tabletop?

π · 16²

π · 16

2 · π · 16

π · 8²

14.

The radius of a circular swimming pool is 6.4 meters. Which is closest to the circumference of this swimming pool?

20.10 m

26.50 m

40.21 m

128.61 m

15.

Use 3.14 for $\pi$

The diameter of a pizza is 18 inches across at its widest part. How many square inches of sauce is needed to completely cover the top of the pizza?

16.

Melinda measured a circular tire and found the diameter was 4 feet and the circumference was 12.6 ft. Which expression represents an approximate value for π?

12.6 + 4

12.6 - 4

12.6 x 4

12.6 ÷ 4

17.

Use 3.14 for $\pi$ and round your answer to the nearest tenth.

What is the circumference of a circle with a radius of 6 cm?

18.

Perimeter is the (a) an object.

Choose from the below words

distance around

space inside

volume of a solid

length of a line segment

19.

Area is the number of (a) needed to (b) or (c) a surface or figure.

Choose from the below words

square units

cover

inches

feet

go around

fill

20.

Sort the following into either PERMIETER or AREA.

Categorize the following

Fence for a yard

Waist size for pants

Size of a picture frame

Size of a room

Amount of space a desk takes up in a room

How much tile is needed for a bathroom floor

Perimeter

Area

21.

Many flags are stored in a wooden triangular shaped frame. How much wood is needed for the outside of the following frame?

33.5 in

45 in

60.5 in

209.25 in

22.

What is the area of the given triangle?

___ $m^2$

100 %

Circles and Triangles

Total questions: 22

Worksheet time: 4hrs 58mins

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