Download Lesson 12-5 Notes: More angles and circles

12-5 Angle Relationships in Circles
Rigor and Relevance
Find the measures of angles formed by lines
that intersect circles.
Use angle measures to solve problems
relating to satellites and optometry.
Holt McDougal Geometry
12-5 Angle Relationships in Circles
Holt McDougal Geometry
12-5 Angle Relationships in Circles
Example 1: Using Tangent-Secant and
Tangent-Chord Angles
Find mEFH and
Holt McDougal Geometry
.
12-5 Angle Relationships in Circles
Example 2: Finding Angle Measures Inside
a Circle
Find mAEB.
Holt McDougal Geometry
12-5 Angle Relationships in Circles
Example 3: Finding Measures Using
Tangents and Secants
Find the value of x in each diagram.
A.
Holt McDougal Geometry
12-5 Angle Relationships in Circles
Example 4: Optometry
Two of the six muscles that control eye
movement are attached to the eyeball and
intersect behind the eye. If mAEB = 225, what
is mACB?
Holt McDougal Geometry
12-5 Angle Relationships in Circles
Example 5: Ferris Wheel
3. An observer watches
people riding a Ferris
wheel that has 12
equally spaced cars.
Find the value of the
angle of elevation, x.
Holt McDougal Geometry
12-5 Angle Relationships in Circles
• Turn in your workbook to page 520
for 1 more theorem and proof.
• Complete Practice #2
Holt McDougal Geometry
12-5 Angle Relationships in Circles
12-5 Classwork
Workbook pg 521 #4 – 7
Textbook pg835#16, 17, 20, 21, 23, 24
Holt McDougal Geometry
12-5 Angle Relationships in Circles
12-4/12-5 Assignment
• Primary assignment:
o join.quizizz.com
o Due Monday 4/17, code expires @7AM
o Codes:
o Period 1– 042391
o Period 5 – 813525
o Period 7 – 125741
• Secondary Assignment:
o Workbook pg 517 #13, 518 #1, 3 – 6
o Workbook pg 522 ALL
Holt McDougal Geometry
12-5 Angle Relationships in Circles
12-4/12-5 Assignment
• Primary assignment:
o join.quizizz.com
o Due Friday 4/14, code expires @7AM
o Codes:
o Period 2–
o Period 4 –
o Period 6 –
• Secondary Assignment:
o Workbook pg 518 ALL
o Workbook pg 522 ALL
Holt McDougal Geometry