What is the area of a circle with a diameter of 10 cm?

Using the formula $$A = \frac{1}{4} \times \text{π} \times d^2$$ , the area is approximately $$A = 78.54 \text{ cm}^2$$ .

What is the relationship between radius and diameter?

The radius is half of the diameter: $$r = \frac{d}{2}$$ .

If the area of a circle is 154 cm², what is the radius?

Using the formula $$A = \text{π} \times r^2$$ , the radius is approximately @@r = rac{A}{ ext{π}} = rac{154}{3.14} ext{ cm} ightarrow r ext{ is approximately } 7 ext{ cm}@@.

What is the circumference of a circle with a radius of 4 m?

Using the formula $$C = 2 \times \text{π} \times r$$ , the circumference is approximately $$C = 25.13 \text{ m}$$ .

How do you find the area of a circle if you only have the circumference?

First, find the diameter using $$d = \frac{C}{\text{π}}$$ , then use the area formula $$A = \frac{1}{4} \times \text{π} \times d^2$$ .

What is the area of a circle with a diameter of 14 cm?

Using the formula $$A = \frac{1}{4} \times \text{π} \times d^2$$ , the area is approximately $$A = 153.86 \text{ cm}^2$$ .

If the radius of a circle is doubled, how does the area change?

If the radius is doubled, the area increases by a factor of four, since area is proportional to the square of the radius.

Circle Area and Circumference Flashcards

Student preview

14 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is the formula for the area of a circle?

Back

Tags

CCSS.7.G.B.4

2.

FLASHCARD QUESTION

Front

What is the formula for the circumference of a circle?

Back

Tags

CCSS.7.G.B.4

3.

FLASHCARD QUESTION

Front

If the radius of a circle is 7 cm, what is the diameter?

Back

Tags

CCSS.7.G.B.4

4.

FLASHCARD QUESTION

Front

What is the area of a circle with a radius of 5 m?

Back

Tags

CCSS.7.G.B.4

5.

FLASHCARD QUESTION

Front

How do you convert diameter to radius?

Back

Tags

CCSS.7.G.B.4

6.

FLASHCARD QUESTION

Front

What is the value of π (pi) approximately?

Back

The value of π (pi) is approximately 3.14.

Tags

CCSS.HSG.GMD.A.1

7.

FLASHCARD QUESTION

Front

If a circle has a circumference of 31.4 m, what is its diameter?

Back

Tags

CCSS.7.G.B.4

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

10 questions

Misplaced and Dangling Modifiers

Flashcard

•

8th Grade

10 questions

Bacteria and fungi

Flashcard

•

6th Grade

9 questions

Year 7 Spring 1 Assessment

Flashcard

•

6th - 8th Grade

12 questions

Newton's Laws Vocab

Flashcard

•

6th Grade

10 questions

Mathematics Glossary

Flashcard

•

KG

10 questions

Disney descendants flashcard

Flashcard

•

KG

15 questions

Similar Figures and Solving Proportions

Flashcard

•

7th Grade

10 questions

Tone, Mood, and Purpose

Flashcard

•

6th Grade

Popular Resources on Wayground

15 questions

Fractions on a Number Line

Quiz

•

3rd Grade

20 questions

Equivalent Fractions

Quiz

•

3rd Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

29 questions

Alg. 1 Section 5.1 Coordinate Plane

Quiz

•

9th Grade

$fractions$

22 questions

fractions

Quiz

•

3rd Grade

11 questions

FOREST Effective communication

Lesson

•

KG

20 questions

Main Idea and Details

Quiz

•

5th Grade

20 questions

Context Clues

Quiz

•

6th Grade

Discover more resources for Mathematics

14 questions

Volume of rectangular prisms

Quiz

•

7th Grade

20 questions

Graphing Inequalities on a Number Line

Quiz

•

6th - 9th Grade

10 questions

Mean, Median, Mode, and Range

Quiz

•

7th Grade

23 questions

Mean median mode and range

Quiz

•

7th Grade

15 questions

Simple Probability

Quiz

•

7th Grade

15 questions

Volume of Triangular and Rectangular Prisms

Quiz

•

5th - 7th Grade

15 questions

Area and Circumference of a Circle

Quiz

•

7th Grade

13 questions

circumference and Area of a Circle

Quiz

•

7th Grade