Tangent Lines to a Circle

Flashcard
•
Mathematics
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a tangent line to a circle?
Back
A tangent line to a circle is a straight line that touches the circle at exactly one point, known as the point of tangency.
2.
FLASHCARD QUESTION
Front
What is the point of tangency?
Back
The point of tangency is the point where a tangent line touches the circle.
3.
FLASHCARD QUESTION
Front
How many tangents can be drawn from a point outside a circle?
Back
Two tangents can be drawn from a point outside a circle.
4.
FLASHCARD QUESTION
Front
What is the relationship between a radius and a tangent line at the point of tangency?
Back
The radius drawn to the point of tangency is perpendicular to the tangent line.
5.
FLASHCARD QUESTION
Front
What is the formula for finding the length of a tangent segment from a point outside the circle?
Back
The length of the tangent segment can be found using the formula: \( L = \sqrt{d^2 - r^2} \), where \( d \) is the distance from the point to the center of the circle and \( r \) is the radius.
6.
FLASHCARD QUESTION
Front
What are common tangents?
Back
Common tangents are lines that are tangent to two circles at the same time.
7.
FLASHCARD QUESTION
Front
How many types of common tangents are there?
Back
There are two types of common tangents: external tangents and internal tangents.
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