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Earn +20 ptsQ: How many sides does a shape with 90 diagonals have?
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What shape has 2 pairs of parallel sides equal length of diagonals which do not cross at 90 degrees?
The shape you are describing is a rhombus. A rhombus has two pairs of parallel sides, with opposite sides being equal in length. The diagonals of a rhombus are also equal in length, but they do not intersect at 90 degrees; instead, they intersect at a 90-degree angle.
What shape has perpendicular diagonals?
A square has perpendicular diagonals. They are all the same angle (90 degrees). All sides are the same length. To find area of a square, use the formula A=4s. (Area=4xthe lenghth of the sides.)
How many diagonals does a pentadecagon have using a formula?
Number of diagonals in a polygon with n sides is n*(n-3)/2 A pentadecagon has 15 sides, so n = 15 Number of diags = 15*12/2 = 90
How many diagonals in a 15 sided polygon?
There are 90 diagonals in a 15-sided polygon.
How many diagonals in a 15 gon?
1/2*15*(15-3) = 90 diagonals.
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