More with Circles
Flashcard
•
Mathematics
•
10th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a tangent line to a circle?
Back
A tangent line is a straight line that touches the circle at exactly one point, known as the point of tangency.
2.
FLASHCARD QUESTION
Front
Define the term 'secant' in relation to circles.
Back
A secant is a line that intersects a circle at two points.
3.
FLASHCARD QUESTION
Front
What is the formula for the circumference of a circle?
Back
The circumference C of a circle is given by the formula C = 2πr, where r is the radius.
4.
FLASHCARD QUESTION
Front
How do you find the area of a circle?
Back
The area A of a circle is calculated using the formula A = πr², where r is the radius.
5.
FLASHCARD QUESTION
Front
What is the relationship between the radius and diameter of a circle?
Back
The diameter d of a circle is twice the length of the radius r, expressed as d = 2r.
6.
FLASHCARD QUESTION
Front
If a circle has a radius of 7, what is its circumference?
Back
C = 2π(7) = 14π, approximately 43.98.
7.
FLASHCARD QUESTION
Front
If a circle has a diameter of 10, what is its area?
Back
First, find the radius: r = 10/2 = 5. Then, A = π(5)² = 25π, approximately 78.54.
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