0
2 Pentagon-5
Hexagon - 9
formula
diagonals=(n-3)+sum from i=1->i=(n-3) [i]
diagonals=(n-3)+1+2+. . .+(n-3)
The n-3 is because you cannot draw lines to a same point or adjacent ones.
The reason (n-3) is used twice, is because the first 2 points you start to draw from are not connected to each other so they draw all the lines they can.
Once you get to the third (assuming you are moving in a circle), the number of lines you can draw is reduced by 1, since that line is already drawn (to the first point). The 4th one now already has a line to the first and second points and so draws 2 less lines.
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∙ 12y ago
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Do diagonals of the shape rectangle cross at right angles?
The diagonals of a rectangle do not cross at right angles
How many pairs of congruent triangles are formed by the diagonals of a rectangle?
4
The diagonals of a rectangle are axes of symmetry?
only when the rectangle is a square
How many lines of symmetry for a rectangle?
Four - Two reflective, and two rotational about the diagonals.
Diagonals cross at right angles?
rectangle
How many diagonals have a rectangle?
It has 2 diagonals
How many diagonals does rectangulo?
A rectangle has 2 diagonals
How many diagonals of a rectangle?
It ha 2 diagonals
How many diagnals does a rectangle have?
It has 2 diagonals
Are the diagonals of a rectangle equel?
Yes the diagonals of a rectangle are equal in lengths
Do the diagonals of a rectangle bisect the angles?
The diagonals of a rectangle bisect the angles only if the rectangle is a square.
What is the Rectangle Diagonals Conjecture?
The diagonals of a rectangle are congruent and they bisect each other.
Are the diagonals of a rectangle sometimes always or never perpendicular?
The diagonals of a rectangle are never perpendicular but the diagonals of a square are perpendicular
What is an attribute of a square that is not an attribute of a rectangle?
The diagonals of a square are perpendicular whereas the diagonals of a rectangle are not perpendicular.
How many diagoanals does a Quadrilateral have?
A Quadrilateral has two diagonals. IF the quadrilateral is a rectangle, then the two diagonals are equal in length.
Does a rectangle have diagonals bisect?
Yes it does - they bisect each other at the exact centre of the rectangle.
Do diagonals of the shape rectangle cross at right angles?
The diagonals of a rectangle do not cross at right angles
