Area of Circles and Rings

Area of Circles and Rings

Assessment

Interactive Video

Mathematics

6th - 8th Grade

Hard

Created by

Amelia Wright

Used 1+ times

FREE Resource

The video tutorial explains how to find the area of a red ring by calculating the areas of two circles and subtracting the smaller circle's area from the larger circle's area. The tutorial uses a step-by-step approach, starting with the introduction of the problem, followed by a strategy overview, detailed calculations using given radii, and concluding with the final calculation and approximation of the area. The use of 3.14 for pi and rounding to the nearest tenth is emphasized throughout the process.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for the area of a circle?

Area = Pi * r^2

Area = 2 * Pi * r

Area = 2 * Pi * r^2

Area = Pi * d

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the general strategy to find the area of the red ring?

Add the areas of the large and small circles

Subtract the area of the small circle from the large circle

Multiply the areas of the large and small circles

Divide the area of the large circle by the small circle

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the radius of the large circle in the problem?

12 units

9 units

10 units

11 units

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What approximate value of Pi is used in the calculations?

3.20

3.14

3.00

3.50

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the area of the large circle calculated?

Pi * 11

Pi * 9

Pi * 11^2

Pi * 9^2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the area of the small circle using the approximate value of Pi?

35.00 square units

30.00 square units

28.26 square units

24.34 square units

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the area of the large circle using the approximate value of Pi?

350.00 square units

400.00 square units

300.00 square units

379.94 square units

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