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# How do you Find The Perimeter of a Circle With an diameter?

Updated: 10/2/2022

Wiki User

9y ago

Multiply the diameter by pi.

Wiki User

9y ago

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Q: How do you Find The Perimeter of a Circle With an diameter?
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### How do you find the perimeter from the diameter?

The perimeter or circumference of a circle = diameter times pi

### How do you find the perimeter of a semi circle with a diameter of 12mm?

-- Find the circumference of a full circle with a diameter of 12 mm.-- The perimeter of the semi-circle is(1/2 the circumference of the full circle) + (the diameter).

### What is the equation to find the perimeter of a circle?

Circumference ("perimeter") of a circle = (pi) x (diameter of the circle)

### Find the perimeter of a circle if the diameter is 36 centimetres?

Perimeter = pi*diameter = 113.1 cm

### How do you find the diameter of a circle with the perimeter?

The equivalent of a "perimeter" in a circle is actually called its circumference. To get the diameter, just divide the circumference by pi.

### How do you find the perimeter for a semi circle?

Its perimeter is half of its circumference plus its diameter

### What happens if you double the diameter of a circle?

You get 2 circles of diameter. If you were trying to find a perimeter, Never double the diameter. If you have a radius, You have to double it to get a perimeter.

### How do you find the area and perimeter of circle?

First you have to measure the diameter of the circle. The diameter is pi (pi is approximately 3.1415) times the diameter is the perimeter. Half the diameter is the radius and the area of a circle is pi times the radius squared. So for example, let us say that you have a circle with a diameter of 3 inches. The perimeter is then about 9.42 inches, and the area is about 7.07 square inches.

### What is perimeter in circle?

Pi (3.1415...) times the diameter of the circle = the perimeter

### How do you find the circumference of a circle if only the perimeter is given?

The perimeter of a circle is the circumference. If you mean the circle is drawn around (and touches the 4 corners of) a square, and you know the perimeter of the square, you divide the square's perimeter by 4, do pythagorean's theorem on the 2 sides (legs) to find the hypotenuse, and that hypotenuse will be the diameter of the circle. You then multiply that diameter you get by pi to get the circumference.

### How do you find the perimeter of a half circle?

Let r be the radius of the circle. Then the perimeter of the half circle is pi*r + 2r. That is half of the circumference plus the diameter.

### If diameter is 7 find perimeter of semi circle?

Pi times the diameter gives you the circumference. Then divide that answer by two. Then add in the diameter - and, voila, you have your answer as to the perimeter of a semicircle.