What is the name of a line or line segment that goes from the edge of a circle to the middle?
A Radius
100
The diameter of a circle is 10cm. What is the radius of the circle?
5cm
100
If Jessicca drew a perfect circle with a radius of 4.5cm, what would the diameter of that circle be?
9 cm
100
Part of the arc LESS THAN 180 DEGREES
MINOR ARC
100
What is a piece of the circumference/circle?
An arc
200
What is the name of a line or line segment that goes from one edge of a circle to another edge?
A Chord
200
Draw a picture of a circle with the radius labeled.
Check answers on whiteboard
200
Lexi had a new circular pool installed in her backyard. If she walks from the edge of the pool to the middle, she walks 12.5 feet. What is the diameter of the pool?
25 feet
200
Segment that touches the circle ONE time.
tangent
200
Number for Pi
Pi (3.141592653...)
300
What is the name of a line or line segment that goes from one edge of a circle to another edge, passing through the center of the circle?
A Diameter
300
If Dominic cut down a tree with a diameter of 7 meters, what would the radius of the tree be?
3.5 meters
300
The radius of the circle at half-court in IHE's gym has a radius of 147cm. What is the diameter of that circle?
294 cm
300
Intersects the circle at two given points.
secant
300
From what language do we get the term 'pi'?
Greek
400
What do we call the distance around the outside of a circle?
The circumference.
400
Aliens landed in Roswell and created a circle in the ground that was 56 meters across. What would the radius of that circle be?
28 meters
400
How do you find the radius?
Divide the diameter by 2.
400
**REVIEW**
Using the discriminant, if your answer is 0 how many solutions do you have?
One real solution
500
Set of all points that are equidistant from the center.
A circle
500
If you are given the radius what do you have to do to find the diameter
Multiply the radius by 2.
500
Mr. Donkersloot has a clock with a minute had that goes from the middle of the clock to the edge. The minute hand is 16cm long. What is the diameter of the clock?
32 cm
500
How do you find the diameter?
Multiply the radius by 2.
500
**REVIEW**
Solve this problem:using factoring or complete the square
x^2 + 8x - 9 = 0