Elmore "words"
Vocabulary
Angle Measures
How long?
Mix it up!!
100
How do you find the measure of a central angle?
measure of the angle = measure of the arc
100
What do you call the distance around a circle?
Circumference
100
If the measure of arc AB = 72 in circle C, find the measure of angle BCD. (See Slide #1.)
108
100
Find the length of arc PQ in circle R to the nearest hundredth. (See slide #6)
3.14 m
100
What is the name of the longest chord in a circle?
diameter
200
How do you find the measure of an inscribed angle?
measure of angle = measure of arc / 2
200
What do you call a line that intersects a circle in exactly one point?
Tangent
200
Find the measure of angle ABC. (See slide #2)
70
200
Find the radius of a circle if a 48-meter chord is 7 meters from the center.
25 m
200
A chord of circle P has length 8 inches and the distance from the center to the chord is 3 inches. Find the radius of circle P.
5 inches.
300
How do you find the measure of an angle formed by intersecting chords?
measure of angle = (measure of arc + measure of arc) / 2
300
What do you call a segment that has its endpoints on a circle?
chord
300
If the measure of angle X = 126, find the measure of angle Z. (See slide #3.)
54
300
Find z. (See slide #7)
10
300
Chord AB measure 4x - 6 centimeters and chord CD measures 6x - 12 centimeters in circle P. If AB and CD are each 4 centimeters from P, find AP.
5 cm
400
How do you find the measure of an angle formed by a secant and a tangent?
measure of angle = (measure of arc - measure of arc) /2
400
What are circles that have different radii, but the same center?
concentric circles
400
Find x. (See Slide #4.)
95
400
Find the radius of the circle whose equation is (x + 3)^2 + ( y - 7)^2 = 289.
17
400
If a clock shows a time of 8:00, what is the measure of the central angle formed by the hands at that time?
120
500
How do you find lengths of secant/tangent segments?
whole(external) = tangent^2
500
What do you call an angle with a vertex that is on the circle and with sides containing chords of the circle?
inscribed angles
500
Find x. (See Slide #5.)
34
500
The diameter of a circle is 18 units long. Find the length of an arc that has a measure of 100 to the nearest hundredth.
15.71 units
500
The diameter of a clock's face is 6 inches. Find the length of the minor arc formed by the hands of the clock at 4:00 to the nearest hundredth.
6.28 inches
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