Parts of a Circle
A 2D shape with 1 side and no exterior angles.
What is a circle?
Length that is twice the amount of a radius.
What is a diameter?
C=dπ or C=2πr
What is the equation to solve for circumference?
(x-h)2+(y-k)2=r2
What is the equation to graph a circle?
1. Plot the center point. 2. Plot 4 points the distance of the radius from the center. 3. Sketch the circle with the 4 points.
What are the steps to graph a circle?
A point from the center of the circle to the edge.
What is a radius?
Radius is 8. Diameter is ______.
What is 16?
Diameter is 3 inches. Circumference is _____.
What is 9.42 inches?
(x-9)2+(y-1)2=16
What is a center point of (9,1) AND what is a radius of 4?
Look at the graph on slide 1.
What is a center at (3,2)? AND What is a radius of 4?
A chord that passes through the center of a circle.
What is a diameter?
Radius is ______. Diameter is 20.
What is 10?
Diameter is 8 meters. Circumference is _____.
What is 25.13 meters?
(x+5)2+(y-5)2=100
What is a center point of (-5, 5) AND what is a radius of 10?
Look at the graph on slide 2.
What is a center at (-1,0)? AND What is a radius of 3?
The length around a circle. Equations include C=d*π and C=2*π*r
What is a circumference?
Diameter is 32.7. Radius is _____.
What is 16.35?
Radius is 10 centimeters. Circumference is ______.
What is 62.83 centimeters?
Center point: (6,8). Radius: 2.
(x-6)2+(y-8)2=4
(x-1)2+(y-2)2=4
Look at the graph on slide 3.
A line inside a circle with both endpoints on the edge of a circle.
What is a chord?
Radius is _____. Diameter is 50.82.
What is 25.41?
Radius is 2.5 miles. Circumference is ______.
What is 15.71 miles?
Center point: (-2,-6). Radius: 5.
(x+2)2+(y+6)2=25
x2+y2=36
Look at the graph on slide 4.