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you subtract 3 from the number of sides then multiply that by the number of sides divided by 2

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Q: How do you find the number of diagonals in a shape?
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Related questions

How many diagonals are there in a 18 sided shape?

Number of diagonals = 18*(18-3)/2 = 135


How many diagonals are in a shape?

n(n - 3)/2. where n is the number of sides in the shape


How many diagonals does an octahedron have?

An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. The number of diagonals will depend on the precise shape.


How many diagonals does shapes have?

It depends on the shape. A square has no diagonals.Improved Answer:-A square has 2 diagonals in common with all other quadrilateralsThe formila is: 0.5*(n2-3n) = diagonals whereas n in the formula represents the number of sides the polygon or shape has


What shape has 2 diagonals?

Any quadrilateral (4-sided shape) has 2 diagonals.


How many diagonals does a shape with 5 sides have?

5(5-3)/2. That it is the formula so that shape would have 5 diagonals. n(n-3)/2 where n is the number of sides


How many diagonals make a shape rigid?

The answer depends on whether the shape is 2-dimensional or 3-d. For a 2-dimensional polygon with n sides, the minimum number is n-3 diagonals.


How do you find out how many diagonals a shape has?

You connect the points that it has, corner to corner and count them. Moo


How many diagonals does a 10 sided shape have?

35 diagonals


How yo find the formula on how to solve the number of diagonals in a polygon?

It is: 0.5*(n2-3n) = diagonals whereas 'n' is the number of sides of the polygon


Where d is the number of diagonals of a polygon with n sides find d if equals 20?

1/2*(n2-3n) = number of diagonals 1/2*(202-60) = 170 diagonals


What is the formula to find the diagonals of a figure?

1/2*(n2-3n) = diagonals when n equals number of sides.