Circle Geometry Concepts

Circle Geometry Concepts

Assessment

Interactive Video

Mathematics

7th - 8th Grade

Practice Problem

Hard

Created by

Thomas White

FREE Resource

Miss White teaches seventh graders about calculating the area and circumference of circles and semi-circles. The lesson includes examples of finding the area of a semi-circle using a given diameter, determining the area of a circle from its circumference, and an exercise on calculating the area of a circle with a given diameter. The lesson emphasizes the use of pi approximated as 22/7 and involves drawing diagrams to aid understanding.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the approximate value of pi used in this lesson?

3.142

3.14

3.14159

22/7

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the diameter of a semi-circle is 14 cm, what is the radius?

14 cm

7 cm

28 cm

21 cm

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you calculate the area of a semi-circle?

1/2 * pi * radius^2

pi * diameter

1/2 * pi * diameter

pi * radius^2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for the circumference of a circle?

pi * radius^2

2 * pi * diameter

2 * pi * radius

pi * diameter

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Given a circumference of 24 pi cm, what is the radius of the circle?

6 cm

48 cm

24 cm

12 cm

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the area of a circle with a radius of 12 cm?

72 pi cm^2

288 pi cm^2

24 pi cm^2

144 pi cm^2

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a circle has a diameter of 42 cm, what is its radius?

14 cm

84 cm

42 cm

21 cm

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