Circle Geometry and Formulas

Circle Geometry and Formulas

Assessment

Interactive Video

Mathematics, Science, Other

7th - 8th Grade

Practice Problem

Hard

Created by

Thomas White

FREE Resource

The video tutorial covers the concept of circumference of a circle, focusing on solving problems using different formulas. It begins with an introduction to the topic, followed by detailed explanations of solving problems using the diameter and radius. The tutorial also discusses the use of variables and coefficients in formulas, and how to convert diameter to radius. The teacher provides step-by-step guidance to ensure understanding of the concepts.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for the circumference of a circle when the diameter is known?

C = πr²

C = πd

C = 2πr

C = 2πd

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the diameter of a circle is 9 inches, what is the circumference using π as 3.14?

28.26 inches

30.00 inches

31.42 inches

25.12 inches

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When should you use π as 22/7 instead of 3.14?

When the diameter is a prime number

When the circumference is a whole number

When the radius is a multiple of 7

When the diameter is a multiple of 5

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the circumference of a circle with a radius of 7 using π as 22/7?

46 cm

40 cm

42 cm

44 cm

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a variable has no coefficient, what number is assumed to be in front of it?

0

2

1

10

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the radius of a circle if the diameter is 1 yard?

2 yards

0.25 yards

1 yard

0.5 yards

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you convert a diameter of 3.4 inches to a radius?

Add 2

Divide by 2

Multiply by 2

Subtract 2

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