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What shape has 2 pairs of parallel sides equal length of diagonals which do not cross at 90 degrees?
A rectangle has 2 pairs of parallel sides and its diagonals are of equal length but do not cross each other at 90 degrees
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 do you compare and contrast an equilateral triangle and a square?
Differences: Squares have 4 sides / equilateral triangles have 3 sides. Squares have 90 degree angles / equilateral triangles have 60 degree angles. Squares have 2 diagonals / equilateral triangles have none Similarities: All sides of the shape are congruent All angles of the shape are congruent
What shape has 4 equal sides and diagonals intersect at 90 degrees?
A rhombus.
What shape has two pairs of equal sides. But no right angles Its diagonals do not cross at 90 degrees?
A parallelogram
What shape has two pairs of parallel sides and equal length diagonals which do not cross at 90 digress?
A rectangle.
What shape has 2 pairs of parallel sides equal length of diagonals which do not cross at 90 degrees?
A rectangle has 2 pairs of parallel sides and its diagonals are of equal length but do not cross each other at 90 degrees
What shape has 2 pairs of adjacent sides which are equal and its diagonals cross at 90 degrees but are not equal?
A kite
What are three attributes of a square?
The sides are equal The angle between adjacent sides is 90 degrees There are two diagonals The diagonals are equal in length The diagonals make 90 degrees with each other The diagonals make 45 degrees with the sides
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.)
What shape has 2 pairs of parallel sides and equal length diagonals which do not cross at 90 degrees?
A parallelogram (or rectangle) which is not a rhombus (or square).
What is the shape has 2 pairs of parallel sides and equal length diagonals which do not cross at 90 degrees?
A rectangle would fit the given description
Which other shape besides square and rhombus have diagonals that intersect at 90 degrees angles?
It is a kite that has diagonals that intersect each other at 90 degrees.
How many sides does a polygon have when it has 90 diagonals explaining your answer?
Let the sides be n and use the formula for the diagonals of a polygon:- If: 0.5*(n^2 -3n) = 90 Then: n^2 -3n -180 = 0 Solving the above quadratic equation: n = -12 or n = 15 Therefore the polygon has 15 sides
How many diagonal lines does a pentadecagon have?
90. Number of diagonals = number_of_sides × (number_of_sides - 3) ÷ 2 → For a Pentadecagon which has 15 sides: Number of diagonals = 15 × (15 - 3) ÷2 = 15 × 12 ÷ 2 = 90
