Circle Basics, Central Angles, and Arcs.
Flashcard
•
Mathematics
•
10th - 12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a chord in a circle?
Back
A chord is a line segment with both endpoints on the circle.
2.
FLASHCARD QUESTION
Front
What is the measure of a central angle?
Back
A central angle is the angle whose vertex is at the center of the circle and whose sides are radii that intersect the circle.
3.
FLASHCARD QUESTION
Front
How do you calculate the length of an arc?
Back
The length of an arc can be calculated using the formula: \( L = \frac{\theta}{360} \times 2\pi r \), where \( \theta \) is the central angle in degrees and \( r \) is the radius.
4.
FLASHCARD QUESTION
Front
What is the formula for the area of a circle?
Back
The area of a circle is given by the formula: \( A = \pi r^2 \), where \( r \) is the radius.
5.
FLASHCARD QUESTION
Front
What is a secant line?
Back
A secant line is a line that intersects a circle at two points.
6.
FLASHCARD QUESTION
Front
What is a tangent line?
Back
A tangent line is a line that touches a circle at exactly one point.
7.
FLASHCARD QUESTION
Front
What is the relationship between the central angle and the arc it subtends?
Back
The measure of the arc is equal to the measure of the central angle that subtends it.
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