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area is 1/2 of the diameter time 3.1415 squared= area
example diameter is 10 of 1/2 of 10 is 5 so 5 x5=25
25 x 3.1415 = 69.133 Radius is 1/2 of diameter
diameter is 2 time the radius
example Radius is 5 so 2(twice) radius (5) is 10
example diameter = 10 so .5 (1/2) is 5
Circumference is pi (3.1415) time diameter.
.example diameter is 10 so 3.14515 x 10= 31.45 https://www.calculatorsoup.com/calculators/geometry-plane/circle.php
If the circle is a drawing, you can measure the diameter and multiply by pi (3.14). The diameter is the widest crossing and goes through the circles center. If the circle is an object, you can wrap tape around it. Mark on the tape where it meets up with the start. Remove the tape, lay it flat and measure it.
If you would like to know the circumference of a 15" diameter circle this is the formula:
circumference = radius x 2 x pi
circumference = diameter x pi
in our case:
circumference = 15" x 3,14
circumference = 47 ,1" (that's 119,634 cm)
The diameter of the circle is the diagonal of the rectangle use Pythagoras this rectangle is a made from two 3,4,5 triangles, so the diameter is 5cm, the radius will be 2.5cm don't forget the BODMAS ordering rule (Brackets of Division Multiplication Addition and Subtraction) Also rounding to 2 decimal places. This solution is based on all four corners of the rectangle touching the circumference of the circle.
Area of a circle is P (22/7) i x Radius (squared ^2) ====> 22/7 x 2.5cm ^ 2 ====> 22/7 x 6.25cm
TOTAL AREA of CIRCLE = 19.64 cm^2
Area of the rectangle is length x width ====> 4 cm x 3 cm
TOTAL AREA of RECTANGLE = 12 cm ^2
The remaining portion is the circle area minus the rectangle 19.64-12 = 7.64 cm^2
SIMPLES brought to you by SpideRaY @ http://www.windowstipsclub.com
what class are you in? Is this your home work?
Anyway, You should know that
Circumference = 2 x pie x radius
therefore radius - circumference / 2 x pie
in this case
radius = 30 x 7 / 2 x 22
= 210 / 44
Now you can calculate that fraction.
Hello my friend, I am Jonas I work as a programmer in some various programming languages. Here try this code:
This program is design to output the Diameter, circumference, and area given a radius of a circle.
#include <iostream.h>
int main()
{
int radius, diameter, circumference, area, pi;
cout << " Enter the radius of a circle\n";
cin >> radius;
pi = 3.14159;
diameter = 2 * radius;
circumference = 2 * pi * radius;
area = pi * (radius)^2;
cout << "Diameter formula executing.....(2 x r)\n";
cout << "Diameter is " << diameter << endl;
cout << "circumference formula executing.....(2 x pi x r)\n";
cout << "circumference is " << circumference << endl;
cout << "area formula executing......(pi x [r x r])\n";
cout << "area is " << area << endl;
return 0;
} Also if you need tutorial you can visit this site Learning C++ .Hope this solution will able to help your problem solved. If you need more assistance just reply to this post or send me a mail at [email protected] you and Godbless.
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