12.1.notebook
May 11, 2016
Warm Up #1
Find the area of the shaded region.
100o
4 in.
12.1.notebook
May 11, 2016
GOALS
Identify tangents, secants, and chords.
Use properties of tangents to solve problems.
12.1.notebook
May 11, 2016
Vocabulary
interior of a circle
concentric circles
exterior of a circle
tangent circles
chord
common tangent
secant
tangent of a circle
point of tangency
congruent circles
12.1.notebook
May 11, 2016
Chord ~ a segment whose endpoints are on the circle
12.1.notebook
May 11, 2016
Secant ~
a line that intersects the circle at two points
12.1.notebook
May 11, 2016
Tangent ~
a line that intersects the circle in exactly one location
Point of tangency ~
The point where a tangent intersects a circle
12.1.notebook
May 11, 2016
The sun's rays are tangent to earth when you view the sunrise
12.1.notebook
May 11, 2016
The interior of a circle is the set of all points inside the circle. The exterior of a circle is the set of all points outside the circle.
12.1.notebook
Draw a circle~ label the following:
A) Chord
B) Secant
C) Tangent
D) Point of tangency
May 11, 2016
12.1.notebook
May 11, 2016
Identify each line or segment that intersects 8L.
JM
JM
JL
KL
LM
KM
line m
12.1.notebook
May 11, 2016
12.1.notebook
May 11, 2016
A common tangent is a line that is tangent to two circles.
12.1.notebook
May 11, 2016
A common tangent is a line that is tangent to two circles.
12.1.notebook
May 11, 2016
12.1.notebook
May 11, 2016
12.1.notebook
May 11, 2016
Early in its flight, the Apollo 11 spacecraft orbited Earth at an altitude of 120 miles. What was the distance from the spacecraft to Earth’s horizon rounded to the nearest mile?
12.1.notebook
May 11, 2016
12.1.notebook
HK and HG are tangent to 8F. Find HG
May 11, 2016
12.1.notebook
May 11, 2016
Homework:
12.1 pg 797 #1­12, 18­25 12.1.notebook
May 11, 2016