Download Circle Vocabulary Review

Circle Geometry – Handout #1
Circle Terminology Review
KLO’s: Understands and applies circle properties.
Learning Outcome (7SS1): Demonstrate an understanding of circles by :
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describing the relationships among radius, diameter and circumference
relating circumference to pi
determining the sum of the central angles
constructing circles with a given radius or diameter
solving problems involving the radii, diameters and circumferences of circles.
On the circle below, draw in and label the following terms:
1) radius
2) diameter
How is the radius and diameter of a circle related?
What is the circumference of a circle?
How do we calculate the circumference of a circle?
LLR Math 9 – Review Handout #1 Circle Geometry – Circle Terminology Review (7SS1)
What does area of an object refer to?
How do we calculate the area of a circle?
What are parallel lines? Give an example of parallel lines found in everyday life.
What are perpendicular lines? Give an example of perpendicular lines found in
everyday life.
What is a bisector?
What is a perpendicular bisector?
LLR Math 9 – Review Handout #1 Circle Geometry – Circle Terminology Review (7SS1)
Example 1 – Measuring Central Angles
What would be the angle formed if the hands pointed to 3 o’clock? __________
What would be the angle formed if the hands pointed to 6 o’clock? __________
What would be the angle formed at 4 o’clock? ______ 2 o’clock? ___________
How about at 8 o’clock? ______ and 11 o’clock? ____________
The measure of the sum of all central angles in a circle equals ______________.
LLR Math 9 – Review Handout #1 Circle Geometry – Circle Terminology Review (7SS1)