Types of Angles
Measuring Angles
Parts of a Circle
Equations for Circles
100
Has an angle that measures exactly 90 degrees.
What is a right angle or square angle?
100
Two angles when added together sum up to 90 degrees.
What are complementary angles?
100
The exact middle of a circle.
What is the center point?
100
the Greek letter representing the number 3.14
What is pi?
200
Has an angle that measures less than 90 degrees.
What is an acute angle?
200
Two angles when added together sum up to 180 degrees.
What is a supplementary angle?
200
The distance around a circle.
What is the circumference?
200
2 x r
What is the diameter?
300
Has an angle that measures greater than 90 degrees.
What is an obtuse angle?
300
The complementary angle to 30 degrees.
What is 60 degrees?
300
A line segment that touches two points in a circle. (Hint: The diameter is one!)
What is a chord?
300
C/d
What is pi?
400
Has an angle measuring exactly 180 degrees.
What is a straight angle?
400
The supplementary angle to 125 degrees.
What is 55 degrees?
400
A chord that goes directly through the center of a circle.
What is the diameter?
400
3.14 x d
What is the circumference?
500
Has an angle measuring greater than 180 degrees.
What is a reflex angle?
500
The complementary angle to 52.8 degrees.
What is 37.2 degrees?
500
Half of the diameter of a circle.
What is the radius?
500
C/3.14
What is the diameter?
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