An angle whose vertex is the center of a circle is a(n) ______.
Parts of a Circle, Tangent lines, Incenter and Circumcenter

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Mathematics
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10th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
central angle
2.
FLASHCARD QUESTION
Front
Define: INCENTER OF A TRIANGLE
Back
the intersection point of the three angle bisectors of a triangle
3.
FLASHCARD QUESTION
Front
What is the definition of a tangent line?
Back
A line that touches a circle at exactly one point.
4.
FLASHCARD QUESTION
Front
What is the formula for the circumference of a circle?
Back
C = 2πr, where r is the radius.
5.
FLASHCARD QUESTION
Front
What is the relationship between a radius and a tangent line at the point of tangency?
Back
The radius is perpendicular to the tangent line.
6.
FLASHCARD QUESTION
Front
If a circle has a radius of 7 cm, what is its circumference?
Back
C = 2π(7) = 14π cm.
7.
FLASHCARD QUESTION
Front
What is the circumcenter of a triangle?
Back
The point where the perpendicular bisectors of the sides of the triangle intersect.
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