Asked by AnnieMaths ๐Ÿ’ฏ

How do you work out perimeter?

Profile picture

VERIFIED

Verified tutor tick

Sebastian Dows-Miller

Experienced language tutor and Oxbridge mentor with over 200 hours experience

The perimeter of a shape is essentially just the combined length of its edges, so the simplest way to work out a perimeter is to work out the lengths of the edges and add them together. For equal-sided shapes like squares, this is just a case of working out the length of one side and multiplying that number by the total number of sides (in the case of a square: 4). To work out the perimeter of a circle, you should use the equation 2ฯ€r, where ฯ€ is the constant โ€˜piโ€™ (3.14159...) and r is the radius of the circle (the distance from the centre to the outer edge).

Sebastian also answered

Asked in Maths ๐Ÿ’ฏ

ASKED BY SOMERSBY

MATHS ๐Ÿ’ฏ

How do you calculate the energy rating of an appliance?

You can use this formula to estimate an appliance's energy use: (Wattage ร— Hours Used Per Day) รท 1000 = Daily Kilowatt-hour (kWh) consumption 1 kilo...

ASKED BY DIANA

MATHS ๐Ÿ’ฏ

The tax rate on Jerome Jame's $112,000 vacation home is 25 mills. The property is assessed at full value. How much will Jerome pay in taxes this year? A. $780 B. $7,800 C. $2,800 D. $28,00?

Hello Diana. The Mills rate represents a figure amount per $1000 of the assessed value of the property (mills is derived from the Latin word "milles...

ASKED BY LACEY

MATHS ๐Ÿ’ฏ

Express 540 as a product of its prime factor?

A prime number is one which does not divide into multiples of smaller numbers and are all odd numbers so not divisible by 2. For 540 you start by di...

ASKED BY LILY

MATHS ๐Ÿ’ฏ

How do you make x the subject of an equation with fractions on each side? For example: v/7x=w/?

Your question is not clear and incomplete but if you mean (v/7x) = (w/y) Easiest way is to flip both sides upside down so (7x/v) = (y/w) Multiply bo...

ASKED BY ANNA

MATHS ๐Ÿ’ฏ

How to do Pythagoras theorem?

Pythagoras theorem States that in a right angled triangle if you square the Hypotenuse c which is longest side facing the right angle (90 degrees) i...

ASKED BY JOSH

MATHS ๐Ÿ’ฏ

How do I find the area of a triangle when I only know the three side lengths?

You need to know at least one angle otherwise it is impossible

ASKED BY FAITH

MATHS ๐Ÿ’ฏ

Increase ยฃ14120 by 4%. Give your answer rounded to 2 decimal points?

4% of 14120 = 1.04x14120 = 14684.8

ASKED BY SARAH

MATHS ๐Ÿ’ฏ

How do I plot a scatter graph with two sets of dat ?

Generate a graph with x and y. Plot the one set of data then plot the other one in a different colour. I am assuming that you are comparing the two ...

ASKED BY SOPHIE

MATHS ๐Ÿ’ฏ

How do you work out what the equation of the parallel line to my=2x+3 and passes through (0,7) is?

If a line is parallel, then the equation of the parallel line will have the same gradient as the original line. In this case, the gradient of then p...

ASKED BY ANNIE

MATHS ๐Ÿ’ฏ

How do you work out perimeter?

The perimeter of a shape is essentially just the combined length of its edges, so the simplest way to work out a perimeter is to work out the length...

Find me a tutor

We take your privacy seriously. View our policy.