circles

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TRIGONOMETRIC FUNCTIONS

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circles

questions

Theorem 2

circumscribing quadrilaterals

triangles:area and perimeter

concentric circles chord/tangent

find length of side of circumscribing triangle

Theorem 1 and 3

use pythagorean theorem to find length of an associated line

prove

concepts

the point where a tangent meets a circle is called the point of contact

a point outside the circle has 2 tangents passing through it

a point on the circle has 1 tangent passing through it

A point inside the circle has no tangents passing through it

A secant is a line that intersects a circle at two distinct points

A tangent is a line that intersects a circle at only one distinct point

theoroms

Theorom 3 = a line drawn through the end of a radius

Theorom 2 = two tangents from a single external point which meet the same circle are equal

Theorom 1 = a tangent which meets the radius of a circle at the point of contact is perpendicular to the radius