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Circumference and Area of a Circle
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How many squares are there on an 8 by 8 chess board?
64
What is 10 squared equal to?
100
How do you solve for the area of a circle?
Multiply pi by radius squared.
What is the diameter of the circle with a radius of 9 cm?
18 cm
What do you call the line segment that connects the center and a point in the circumference of a circle?
radius
What is circle?
Set of all points that are equidistant from another single point.
What is pi?
The ratio between the circumference to the diameter.
What is the estimated value of pi?
3.14
Give an object that resembles a circle.
...
If the diameter is 20 inches, what is its radius?
10 inches
Explain how you multiply numbers with decimals.
...
The radius is 3 meters, what is its diameter?
6 meters
How do you solve for the circumference of a circle?
Multiply pi by the diameter.
CIRCUMFERENCE OR AREA. If I am trying to figure out how much space is inside a circular frame, I need the...
area
CIRCUMFERENCE OR AREA. If I am trying to figure out how much ribbon to put around a circular frame, I need the...
circumference
TRUE OR FALSE. Circle is a polygon.
FALSE
Which part of the circle is its area?
The space/region inside.
Which part of the circle is its area?
The space/region inside.
How do you get the length of the radius from a given diameter?
Divide the diameter by two.
TRUE OR FALSE. To get the area of a circle, multiply ? by the radius.
FALSE
TRUE OR FALSE. Diameter is half the radius.
FALSE
What is the radius of the circle if the diameter is 10 cm?
5 cm
What do you call the perimeter of a circle?
circumference