Colulate diameter if dianeter 7.5cm
Answers
Answer:
The circumference of a circle with diameter 7.5 is 23.56(*)
Step-by-step explanation:
What is the area of a circle with diameter 7.5 cm
Here is the answer to questions like: how to find the area of a circle with diameter 7.5 cm?
Circle Calculator
Area Circunference
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Radius: orDiameter orCircumference:Unit: inches feet yards miles kilometers meters centimeters millimeters Calculate Area
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The area of a circle with diameter 7.5 is 44.18
Formulae:
r = 3.75d = 7.5C = 23.6
A = πr2 = π(d2)2
A = C24π
π = 3.1415
A = area
C = circumference or perimeter
r = radius, d = diameter
Solution Steps:
Area of a circle in terms of radius:
Area = π·r2 = 3.14·3.752 = 44.18 square cm(*)
Area of a circle in terms of diameter:
Area = π·(d2)2 = 3.14·(7.52)2 = 3.14·(3.75)2 = 44.18 square cm(*)
Area of a circle in terms of circumference:
Area = C24π = 23.5624π = 555.07(4·3.14) = 555.0712.56 = 44.18 square cm(*)
(*) 44.178646691106 cm, exactly or limited to the precision of this calculator (13 decimal places).
Note: for simplicity, the operations above were rounded to 2 decimal places and π was rounded to 3.14.
Result in other units of area:
A circle of radius = 3.75 or diameter = 7.5 or circumference = 23.56 cm has an area of:
4.418 × 10-9 square kilometers (km²)
0.004418 square meters (m²)
44.18 square centimeters (cm²)
4418 square millimeters (mm²)
1.7058 × 10-9 square miles (mi²)
0.00528388 square yards (yd²)
0.047555 square feet (ft²)
6.84791 square inches (in²)
Use the this circle area calculator below to find the area of a circle given its diameter, or other parameters. To calculate the area, you just need to enter a positive numeric value in one of the 3 fields of the calculator. You can also see at the bottom of the calculator, the step-by-step solution.
Formula for area of a circle
Here a three ways to find the area of a circle (formulas):
Circle area formula in terms of radius
A = πr2
Circle area formula in terms of diameter
A = π(d2)2
Circle area formula in terms of circumference
A = C24π
See below some definitions related to the formulas:
Circumference
Circumference is the linear distance around the circle edge.
Radius
The radius of a circle is any of the line segments from its center to its perimeter. The radius is half the diameter or r = d2.
Diameter
The diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. The diameter is twice the radius or d = 2·r.
The Greek letter π
π represents the number Pi which is defined as the ratio of the circumference of a circle to its diameter or π = Cd . For simplicity, you can use Pi = 3.14 or Pi = 3.1415. Pi is an irrational number. The first 100 digits of Pi are: 3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 ...
Note:
If you input the radius in centimeters, you will get the answer in square centimeters (cm²), if in inches, will get the answer in square inches (in²) and so on ...
Circumference is often misspelled as circunference.
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