How do you find the area of a semicircle?

The area of a semicircle is given by A = $$\frac{1}{2} \times \text{πr}^2$$ .

What is the relationship between diameter and radius?

The diameter is twice the length of the radius: $$d = 2r$$ .

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.

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

The diameter d = $$\frac{C}{\text{π}} = \frac{31.4}{\text{π}} \text{ cm}$$ .

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

The area A = $$\text{π} \times 5^2 = 25\text{π} \text{ cm}^2$$ .

What is the formula to convert diameter to radius?

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

If a circle has a radius of 3 cm, what is its circumference?

The circumference C = $$2\text{π} \times 3 = 6\text{π} \text{ cm}$$ .

Topic 51 Circles - Area and Circumference Flashcards

Student preview

15 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is the area of a circle?

Back

The space inside the circle.

2.

FLASHCARD QUESTION

Front

What is the formula for the area of a circle?

Back

Tags

CCSS.7.G.B.4

3.

FLASHCARD QUESTION

Front

What is the circumference of a circle?

Back

The distance around a circle.

Tags

CCSS.7.G.B.4

4.

FLASHCARD QUESTION

Front

What is the formula for the circumference of a circle?

Back

Tags

CCSS.7.G.B.4

5.

FLASHCARD QUESTION

Front

If a circle has a radius of 7 cm, what is its area?

Back

Tags

CCSS.7.G.B.4

6.

FLASHCARD QUESTION

Front

If a circle has a diameter of 10 cm, what is its circumference?

Back

Tags

CCSS.7.G.B.4

7.

FLASHCARD QUESTION

Front

What is a semicircle?

Back

A semicircle is half of a circle, formed by cutting a whole circle along its diameter.

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

15 questions

Yr7-02-Networks-Flashcards

Flashcard

•

6th Grade

10 questions

Basic Concepts of Probability

Flashcard

•

8th Grade

8 questions

Graphic Novels Vocabulary

Flashcard

•

7th Grade

8 questions

El fin de la República y la Guerra Civil

Flashcard

•

6th Grade

10 questions

Avaliação 8º ANO

Flashcard

•

8th Grade

10 questions

Mathematics: Real and Rational Numbers

Flashcard

•

7th Grade

15 questions

Pelaku Ekonomi

Flashcard

•

8th Grade

15 questions

Full Blast 3 1b

Flashcard

•

6th - 8th Grade

Popular Resources on Wayground

8 questions

Spartan Way - Classroom Responsible

Quiz

•

9th - 12th Grade

15 questions

Fractions on a Number Line

Quiz

•

3rd Grade

14 questions

Boundaries & Healthy Relationships

Lesson

•

6th - 8th Grade

20 questions

Equivalent Fractions

Quiz

•

3rd Grade

3 questions

Integrity and Your Health

Lesson

•

6th - 8th Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

9 questions

FOREST Perception

Lesson

•

KG

20 questions

Main Idea and Details

Quiz

•

5th 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

18 questions

Identifying Radius/Diameter

Quiz

•

7th Grade

20 questions

Complementary and Supplementary Angles

Quiz

•

7th Grade

15 questions

Area and Circumference of a Circle

Quiz

•

7th Grade

21 questions

Circumference of a Circle

Quiz

•

7th Grade

20 questions

Mean, Median, Mode and Range

Quiz

•

5th - 7th Grade

20 questions

Slope Intercept Form

Quiz

•

7th - 8th Grade