Radius & Diameter
What is Radius?
Radius is the distance from the centre of a circle to any point of the circle.
What is Circumference?
Circumference is the distance around a circle.
What is the formula for area of a circle?
A= pi*r2
A bicycle wheel has a radius of 1 foot. If the bicycle wheel rotates one time, what distance is travelled?
What is 2pi or 6.28 feet.
How many digits are in Pi?
Infinite. It is an irrational number
What is Diameter?
The distance across a circle measured through its centre.
What is the formula for circumference of a cirlce?
2(pi)r or (pi)D
A circle has a diameter of 16. Find the area.
200.96
The circumference of a wheel is 113.04 inches. What is the radius of the wheel?
What is 18 inches?
How tall is a giraffe?
17 feet (5.5 meters
What is the relationship between radius and diameter?
1:2
A circle has a diameter of 102.38 inches. What is the circumference?
What is 321.47 inches?
A circle has a radius of 50 miles. What is the area of the circle TO THE NEAREST MILE?
What is 7850 mi2.
If your circumference is 72.98 what is your radius?
What is 11.62?
What is the name of Santa’s reindeer?
Rudolph, vixen, prancer, dasher, commit, Cupid, donner, blitzen
Clare has a round tablecloth with a radius of 4 feet. What is the tablecloth's area?
50.24 ft2
A circle has a radius of 16 feet. Find the Circumference.
100.48 feet
A pizza is 16 inches long (diameter). It is cut into 4 pieces. Jane eats 3 of the pieces. What is the area of pizza she is eating?
What is 150.72 in2
John owns a circular pool in his back yard. If he swims around the pool, he swims 94.2 meters. What is the radius of this circle?
What is 15 meters.
How cold is it in the South Pole?
-40 Celsius
The diameter of a circular park is 98 m. Find the cost of fencing it at $4 per meter.
$1232.00
If the radius is 123.45, this is the circumference.
What is 775.266?
If the diameter of a circle is 7 what is its area?
What is 38.465?
A circle has a circumference of 18.84
.
What is the area?
What is 28.26
How many sevens are in Thailand?
>15,430