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Angle at the centre of a circle by an arc
Angle at the centre of a circle by an arc
Theory
Theory
Procedure
Animation
Simulator
Self Evaluation
Reference
Feedback
1)
In the given circle, find ∠x.
50°
125°
100°
25°
2)
ADB is a arc of circle with centre O. If ∠ACB is 35° then ∠AOB?
45°
110°
70°
30°
3)
O is centre of the circle. ∠AOC is 120°. Find ∠ABC.
180°
90°
230°
120°
4)
What describes best BA and BC.
chord
tangent
segment
none
5)
What does black line in circle stands for?
radius
diameter
segment
all of above
6)
The angle subtended at the center of a circle by an arc is twice the angle subtended by the same arc at any point on the circumference. True or False?
False
True
7)
If an arc in a circle subtends a 120-degree angle at the center, what is the angle subtended by the same arc at any point on the circumference?
120 degrees
30 degrees
90 degrees
60 degrees
8)
What is the relationship between the measure of an angle subtended by an arc and the length of the arc in a circle?
The angle and arc length are equal.
There is no direct relationship between the angle and arc length.
The angle is half the length of the arc.
The angle is twice the length of the arc.
9)
If an arc subtends a 60-degree angle at the center of a circle, what fraction of the circumference does the arc represent?
1/2
1/6
1/4
1/3
10)
If an arc subtends a 120-degree angle at the center of a circle, what fraction of the circumference does the arc represent?
1/4
1/3
2/3
1/2