what is a tangent? a tangent (line ab) is a line that intersects the outside of the circle. the...
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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
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How many points of tangency can you
have from one point?
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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
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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
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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?
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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
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Assignment
Pg. 388
#3-9, 11-14,15a
Then 17, 19