A circle has a circumference of 10π cm. What is the area if this circle? Justify your answer completely.
✐Explanation✐
C = 2πr (circumference of a circle)
A = πr² (area of a circle)
Use the circumference formula to determine r first. Then, use the area formula to determine the answer.
C = 10π
10π = 2πr
r = 5 cm
Substitute [...]
The question is: The area of a circle is proportional to the square of the radius. If the area is 113 cm^2 when the radius is 6 cm, find:
the radius of a circle with area 29 cm^2
Please show the working.. It will help me to understand it. Thanks.
A = pi r^2 = 29
r^2 = 29/pi [...]
A sphere of radius 9 meters is intersected by a plane passing 7 meters from the sphere’s center. What is the area of the circle of intersection of the plane and sphere? Please use 3.14 for the approximation of pi.
Radius of the circle = ( 9^2 – 7^2)^0.5 = 5.657 m
area = 3.14 [...]
Ok, so you have to find the area of the shaded shape which is the circle.The circle has a radius of 4cm and the squares’ (which is in the middle of the circle) length is 4×4. Please help me, It’s due for Monday.
Use the formula πr^2 to find the circle.
π x (4)^2 = 50.27
The area [...]
The center circle has a radius of 1000 inches.
Assume that all of the other circles are tangent to the circles adjacent to them. What is the total area, in square inches, of all of the blue-coloured circles?
There are 10 medium circles around the middle and the blue small circles are in the " triangles" of [...]
What is the area of a circle that circumscribes a 45-45-90 triangle if the legs measure 8 cm?
What is the area of a circle inscribed within an isosceles right triangle whose legs measure 8cm?
What is the area of the square that can be placed within a 45-45-90 triangle whose legs measure 8cm? Two of the [...]
The area of a circle with radius r is given by the formula A="pie"r^2. If a circle has area 169"pie square inches, what is the radius?
Well, the formula for area is:
A=pi*r^2
So, let’s plug in what A is:
169pi=pi*r^2
We can divide each side by pi to get rid of it:
169=r^2
r=13 or -13, depending what quadrant you’re [...]
Going to museum hop all day and need kid-friendly places for lunch and dinner.
Most of the museums have cafes, but here’s a list of other restaurants in the University Circle area. Many are in Little Italy, which would require a car unless you want to figure out the RTA schedule and pay the fares.
http://www.universitycircle.org/category-listings.aspx?cat=5§ion=visit&page=3
Mamma [...]
how do u find area of a circle using circumference for example 18.84 units is the circumference.
Divide the circumference by PI (approximately 3.14159) to get the diameter. Then divide the diameter by 2 to get the radius. Then the area is equal to PI times (radius squared). Usually stated as A [...]
For example.
The circles diameter is 30.2cm. The circles circumfrence is 94.828. How do you find the area of the circle?
You can use the fact that area of a circle is:
A = πr^2.
Note that we can use the circumference to find the radius as well. But we are already given the diameter! So who cares about [...]
