Finding Area of Circles Study Guide - Math 7

Finding Area of Circles Study Guide - Math 7

Multiple Choice

Remember to use the following equation for finding the area of circles!

Area: A = πr²

^{Remember if they give you diameter, you must first divide it by 2 to get the radius.}

• Got it!

• Huh?

Multiple Choice

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

Multiple Choice

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

• center

• diameter

• dime eater

• radius

Multiple Choice

After taking part in a competition, Yahir received a bronze medal with a radius of 2.5 inches. What is the medal's diameter?

• 2.5 in
• 5 in
• 4 in
• 4.5 in

Multiple Choice

Shring's dining room table is round and has a diameter of 6 feet. What is the tabletop's radius?

• 3 feet

• 12 feet

• 4 feet

• 6 feet

Multiple Choice

What is the area of this circle? Round to the nearest tenth.

• 6082.1

• 1519.8

• 69.1

• 1292.9

Multiple Choice

What is the area of this circle?

• 62.8

• 31.4

• 314

• 1256

Multiple Choice

What is the area of this circle? Round to the nearest tenth.

• 1384.7

• 65.9

• 131.9

• 1289.12

Multiple Choice

What is the area of this circle? Round to the nearest tenth.

• 163.2

• 75.4

• 37.7

• 113.0

Multiple Choice

Find the area of the circle. Leave your answer in terms of pi.

• $28.26\pi$

• $81\pi$

• $3\pi$
  

• $9\pi$
  

Multiple Choice

Find the area of the circle. Leave your answer in terms of pi.

• $18\pi$

  
  

• $9\pi$
  

• $81\pi$

• $254.34\pi$
  

Multiple Choice

Jack’s circular plate has an area of 50.24 square inches.  What is the radius of his plate? Use π = 3.14.

• r = 6 in
• r = 16 in
• r = 8 in
• r = 4 in

Multiple Choice

A circle has an area of 113.04 square centimeters. What is the radius of the circle?

• 3 cm

• 36 cm

• 6 cm

• 9 cm