Find the diameter of a certain circle with an area of 56.5 square inches?
use algabra with the formula pi*r^2=area
so divide by pi, then take the square root of that.
I need to know. Given the measurement or area of a polygon or circle, how do you find out the area of another circle or polygon sincribed in it?
Let
A=Area of the inscribed circle
B=Area of the Polygon
r=radius of circle
a=a side of the Polygon
A=π*r^2
B=5*a*r/2
we need only the relationship between r and a :
first see that we can [...]
Suppose there was a circle, the area of which is 400,000 units. What would the radius of that circle be?
The formula for the area of a circle is pi times r2. To find the radius, divide the area by pi then find the square root of that answer.
400000/3.14 = 127388.5350318471
√127388.5350318471 = 356.9153051241248
Hope that helped! [...]
The area of the sector is 16m^2 and the central angle is 2 rad. Find the radius of the circle?
Area of a circle / angle at the centre = Area of a sector / angle subtended at the centre.
πr² / 2π = 16 / 2
r² / 2 = 8
r² = 16 therefore r = √16 [...]
What is the relationship between the diameter of a circle and the area of the circle?
Let diameter = d
radius = r
We know that radius is half of diameter.
That is r = d/2.
Equation for area of a circle A = πr²
[...]
A=πr^2 is area of circle. But only given the circumference (C) such as 16π mm. And given the diameter (d) the circumference can be found by C=πd or d=2r (radius), so C=2πr, Okay so basically asking how to find the area of a circle, given the circumference, and using the circumference to find the diameter, [...]
So if i have a circle with an area of 100 meters squared how do you find the circumference?
You need to work backwards.
You know that the area of a circle is found using the formula A = pi (3.14) x radius x radius. So, if you divide the known area (100 meters) by pi [...]
Hi,
Please help me find the answer to this, getting really confused.
The perimeter of a semi circle is 49.7cm, find the area to the nearest square millimetre?
I cant work out how to get the radius or diameter to do the Area = pi x r^2 calculation.
Thanks
Just to clarify i need to find the AREA OF THE [...]
From a piece of tin in the shape of a square 6 inches on a side, the largest possible circle is cut out. Of the following, the ratio of the area of the circle to the area of the original square is closest in value to…:
F. 4/5
G. 2/3
H. 3/5
J. 7/9
K. 3/4
Please explain how you found [...]
Two perpendicular chords divide a circle with radius of 13 inches into four parts. If the perpendicular distances of both chords are 5 cm each from the center of the circle. Find the area of the smallest part.
The area of a quarter of the circle is 169pi/4. From this, take away two circular sectors [...]
