Area of Circles & Sectors
Flashcard
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Hard
Standards-aligned
Wayground Content
FREE Resource
Student preview
15 questions
Show all answers
1.
FLASHCARD QUESTION
Front
What is the formula for the area of a circle?
Back
A = πr², where A is the area and r is the radius.
Tags
CCSS.7.G.B.4
2.
FLASHCARD QUESTION
Front
What is the value of π (pi) approximately?
Back
π is approximately 3.14.
Tags
CCSS.HSG.GMD.A.1
3.
FLASHCARD QUESTION
Front
How do you find the radius if you know the area of a circle?
Back
Use the formula r = √(A/π).
Tags
CCSS.7.G.B.4
4.
FLASHCARD QUESTION
Front
What is the area of a circle with a radius of 5 units?
Back
A = π(5)² = 25π square units.
Tags
CCSS.7.G.B.4
5.
FLASHCARD QUESTION
Front
What is a sector of a circle?
Back
A sector is a portion of a circle enclosed by two radii and the arc between them.
6.
FLASHCARD QUESTION
Front
How do you calculate the area of a sector?
Back
Area of sector = (θ/360) × πr², where θ is the angle in degrees.
Tags
CCSS.HSG.C.B.5
7.
FLASHCARD QUESTION
Front
What is the area of a circle with a diameter of 10 units?
Back
A = π(5)² = 25π square units.
Tags
CCSS.7.G.B.4
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