what is a tangent? a tangent (line ab) is a line that intersects the outside of the circle. the...

What is a tangent? A tangent (Line AB) is a line that intersects the outside of the circle.

The point of tangency (Point P) is where the line intersects the circle.

A

B

P

How many points of tangency can you

have from one point?

What is the tangent-radius

property? A tangent-radius property is:

The line formed between the centre of the circle, O, and the point of tangency, P, forms and 90 degree angle with the tangent line, AB.

A

B

P

O

Why is the Pythagorean Theorem so

important to us? What shape do we have now?

What is the length of C?

A

B

P

O

104

C

Circle Tangents

What is a tangent?

How is it formed?

What is the tangent-radius property?

How important is the Pythagorean Theorem?

What do the interior angles of every triangle add up to?

Circle Tangents

The interior angles of every triangle add up to 180 degrees.

REMEMBER:

An isoceles triangle has two equal sides and two equal angles.

An equilateral triangle has three equal sides and three equal angles

Assignment

Pg. 388

#3-9, 11-14,15a

Then 17, 19