March 28, 2017
10.2 Arcs
Vocabulary Review
minor arc
major arc
central angle
semicircle
Arc Measure VS Arc Length
March 28, 2017
Find the measure of arc DH.
When are arcs congruent?
Tell whether
is congruent to
What are similar circles?
What are similar arcs?
March 28, 2017
GAME TIMER For game play, the timer is started at 10 and moves counterclockwise.
1. What is the measure of the arc traced out by the tip of the pointer as it moves from
one number to the next on the timer?
2. What is the measure of the arc traced out as the pointer moves from the 10 to the 0?
3. A player starts the timer at the 10 and stops it after 3.4 seconds. What is the
measure of the arc generated?
4. A player stops the timer after 2.3 seconds, then after 1.2 seconds, and again after 2.5
seconds. What is the sum of the measures of the arcs?
5. How much time does it take the pointer to trace out an arc of 60 ˚?
1.
32.7°
2.
327.3°
3.
111.3°
4.
196.4°
5.
1.8 seconds