Unit 10 Geometry Review - Circles

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•
Mathematics
•
10th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the formula for the circumference of a circle?
Back
C = 2πr, where C is the circumference and r is the radius.
2.
FLASHCARD QUESTION
Front
How do you find the radius of a circle if you know the circumference?
Back
Use the formula r = C / (2π), where C is the circumference.
3.
FLASHCARD QUESTION
Front
What is the value of π (pi) to two decimal places?
Back
π ≈ 3.14.
4.
FLASHCARD QUESTION
Front
If the radius of a circle is 5.2 feet, what is the circumference?
Back
C = 2π(5.2) ≈ 32.7 feet.
5.
FLASHCARD QUESTION
Front
What is an arc in a circle?
Back
An arc is a portion of the circumference of a circle.
6.
FLASHCARD QUESTION
Front
How do you calculate the length of an arc?
Back
Arc length = (θ/360) × C, where θ is the angle in degrees and C is the circumference.
7.
FLASHCARD QUESTION
Front
What is the relationship between the diameter and the radius of a circle?
Back
The diameter is twice the radius: d = 2r.
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