Fold the top angle over from about 1/3 up over the centre to create a point at the bottom and a flat surface at the top.
To make a triangle fold it diagonally vertex to vertex To make a rectangle fold it side to side To make an irregular pentagon fold over one corner without touching the opposite corner
You need to draw one diagonal. Look at the hexagon and then look at a pentagon. The triangle should stand out pretty well then.
Triangle
Consider the pentagon ABCDE. By drawing diagonals from B, we get: 1. Triangle ABE 2. Triangle BDE 3. Triangle BCD -Ashwin Hendre
For example, one that has 3 sides (a triangle), one that has 5 sides (a pentagon), etc.
Five side is always a pentagon, but there's no pentagon that always has exactly one right angle. A regular pentagon has no right angles. An irregular pentagon can have one, two, or three right angles, or none.
triangle and trrapezium
There is only one line of symmetry in a isosceles triangle because if you fold that figure in half, down the middle is the only way the folded sides would be equal.
A big triangle if you put the triangle on the trapezoid's short parallel side, or a parallelogram if you put it on one of the trapezoid's ends. In both cases the triangle must be exactly the right shape and size or you will only have an irregular quadrilateral, pentagon, or hexagon. (Placing an appropriately-sized triangle on the long parallel side will also yield a pentagon - likely irregular.) Additionally, if a vertex of the triangle touches the trapezoid it can also make an irregular concave heptagon!
The difference between a triangle, rectangle, pentagon, and parallelogram id the number of sides: Triangle= 3 sides Rectangle= 4 sides Pentogon= 5 sides But, a parallelogram, is a polygon that has all sides parael to one another.
Not sure what the question means. A triangle or quadrilateral may but need not contain an obtuse angle. A pentagon or any polygon with more sides must contain at least one obtuse angle.
Kind of like the outline of the Superman logo. Just fold in one corner of a square.