Categories: All - contact - theorems

by Ruchith Simha 6 years ago

419

circles

circles

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