Circle information
What is the distance called that stretches the inside width of the circle, crossing through the center?
Diameter
What does circumference mean?
the distance around a circle
What is the equation for the area of a circle?
A = pi(r)(r)
what is the area of a circle with a 2.4 cm radius? (to the nearest tenth)
18.0864 cm squared
What is the distance from the center of the circle to the outer edge called?
What is the equation for circumference?
C = pi(d) OR C =2(pi)(r)
If you have a circular mirror with a radius of 20cm, what is its area?
1256 cm2
true or false: If the radius of a circle is doubled, then the circumference is also doubled?
Always true
How do you find the diameter if you know the radius?
What is the circumference of a circle if it has a diameter of 5.2 m?
16.328 m
The area of a circle with a diameter of 6 is
answer: 28.26 units squared
How many times longer is the circumference of a circle than the diameter?
3.14 (pi)
How do you find the radius if you have the diameter?
divide the diameter by 2 (cut the diameter in half)
If you are given a radius of 6cm, what is the circumference?
37.68 cm
A circle has a diameter of 25cm. What is it's area?
490.625cm2
What is the measure of the amount space inside a 2-D shape?
area
What is the radius of a circle with a diameter of 95m?
47.5 m
What is the circumference of a circle that has a radius of 132 mm?
828.96 mm
14 meters of fencing is used to separate a circular enclosure in half. What is the area of the circle?
153.86 meters squared
A binder ring has a diameter of 28mm. What is the circumference of the ring?
87.92 mm