
James Gonzalez
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8 Slides • 6 Questions
1
4.1a Central Angles and Arcs
SOL G.11.a
I can describe arc measures associated with central angles.
2
QUICK REVIEW
Remember this?
Central angles are angles with a vertex at the center of the circle.
Arcs are pieces of a circle's border.
The measure of a central angle is equal to the measure of its intercepted arc.
3
Central angles are like pie slices. Their intercepted arcs are the pie crust.
4
Multiple Choice
Name the arc intercepted by
∠1 .5
Multiple Choice
Which angle is intercepted by the arc HJ?
∠1
∠2
∠3
6
Multiple Choice
What is the measure of the missing arc?
160º
95º
80º
180º
7
Multiple Choice
What is the measure of the missing arc?
155º
145º
300º
180º
8
More Advanced
Find the measure of arc TS.
How might you find that arc TS?
9
Open Ended
How might you find the arc TS? Write down your thoughts. Try to be specific. What do you think the measure is?
10
11
Let's try this one.
Find the measure of the arc RS.
12
13
Open Ended
Do you have any questions about that last one?
Did you get the same answer?
14
Now you try... Find this practice assignment in your Module 4.
PLEASE READ THE DIRECTIONS!
4.1a Central Angles and Arcs
SOL G.11.a
I can describe arc measures associated with central angles.
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