What is the formula for the area of a circle?
Area of Crircles

Flashcard
•
Mathematics
•
7th Grade
•
Hard
Quizizz Content
FREE Resource
Student preview

15 questions
Show all answers
1.
FLASHCARD QUESTION
Front
Back
The area of a circle is calculated using the formula A = πr², where A is the area and r is the radius.
2.
FLASHCARD QUESTION
Front
If the radius of a circle is 5 cm, what is its area?
Back
A = π(5 cm)² = 25π cm² ≈ 78.5 cm².
3.
FLASHCARD QUESTION
Front
What does π (pi) represent in the context of circles?
Back
π (pi) is a mathematical constant approximately equal to 3.14, representing the ratio of the circumference of a circle to its diameter.
4.
FLASHCARD QUESTION
Front
How do you find the radius if you know the area of the circle?
Back
To find the radius, rearrange the area formula: r = √(A/π).
5.
FLASHCARD QUESTION
Front
What is the area of a circle with a diameter of 10 inches?
Back
First, find the radius: r = diameter/2 = 5 inches. Then, A = π(5 inches)² = 25π inches² ≈ 78.5 inches².
6.
FLASHCARD QUESTION
Front
What is the area of a circle with a radius of 3 m?
Back
A = π(3 m)² = 9π m² ≈ 28.3 m².
7.
FLASHCARD QUESTION
Front
If the area of a circle is 50.3 cm², what is the radius?
Back
Using the formula r = √(A/π), r = √(50.3/π) ≈ 4.0 cm.
Create a free account and access millions of resources
Similar Resources on Quizizz
12 questions
Area of Circles, Semi-Circles, and Quarter-Circles

Flashcard
•
7th Grade
10 questions
Unit 4 Geometry Midway Summative Study Guide

Flashcard
•
7th Grade
13 questions
Area and Circumference of Circles

Flashcard
•
7th Grade
14 questions
2d Geometry: 2A Area

Flashcard
•
7th Grade
11 questions
Circles

Flashcard
•
6th - 8th Grade
11 questions
Area and Circumference of a Circle

Flashcard
•
7th Grade
9 questions
Geometry Formulas

Flashcard
•
7th Grade
13 questions
Circumference and Area

Flashcard
•
7th Grade
Popular Resources on Quizizz
15 questions
Multiplication Facts

Quiz
•
4th Grade
25 questions
SS Combined Advisory Quiz

Quiz
•
6th - 8th Grade
40 questions
Week 4 Student In Class Practice Set

Quiz
•
9th - 12th Grade
40 questions
SOL: ILE DNA Tech, Gen, Evol 2025

Quiz
•
9th - 12th Grade
20 questions
NC Universities (R2H)

Quiz
•
9th - 12th Grade
15 questions
June Review Quiz

Quiz
•
Professional Development
20 questions
Congruent and Similar Triangles

Quiz
•
8th Grade
25 questions
Triangle Inequalities

Quiz
•
10th - 12th Grade