
Angle at the centre of a circle theorem
Authored by Sam Atakorah
Mathematics
9th Grade
Used 7+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What circle theorem can be used in this diagram?
A 90-degree angle is formed in a semi-circle
The angle at the centre of a circle is twice the angle at the circumference
Angles in a cyclic quadrilateral add to make 180 degrees
Alternate segment theorem
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the value of the angle marked x....
50
100
80
90
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the m∠ADB?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
find the measure of angle a
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the value of the angle marked x....
125
70
110
55
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Shown is a circle with centre O.
ABC is a straight line.
Angle CBD is 146°.
Find the size of angle AOD.
86
68
34
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What are the sizes of a and b?
a = 57, b = 114
a = 57, b = 57
a = 114, b = 57
a = 57, b = 28.5
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