Quadrilaterals
Take two pairs of set squares from your geometry box. You may notice that there are both different types. One has a angle combination of 45°-90°-45° while the other has 30°-90°-60°. Using these, try to align any two of them by placing them adjacent to each other, such that a quadrilateral is formed.
What shape does the above image represent?
When we place the two identical 45°-90°-45° set squares, we get a square.
What shape do the above image represent?
When we place the two identical 30°-90°-60° set squares and align them similarly, as done in the previous case, we get a rectangle.
What shape do the above image represent?
Now, let's change the positions a bit. If we place the pair of 30°–60°–90° set-squares such that, the side having equal length is joined together, we get a parallelogram.
What shape do the above image represent?
If we use four 30°–60°–90° set-squares and align them so that they come together to form a square, we instead get a rhombus (since all the sides are not equal).
What shape do the above image represent?
We get a trapezium, if after making a rectangle with two 30°-90°-60° set squares, we add in a third set-square such that the sides of the same length are aligned together.
Try to move each of these events to the description:
A quadrilateral is a polygon which has
Some other types of quadrilaterals apart from square and rectangle include :
Trapezium: A quadrilateral in which one pair of two opposite sides is parallel.
Parallelogram: Quadrilateral where the opposite sides are parallel.
Rhombus : Quadrilateral where the opposite sides are parallel to each other and all the sides are equal. In other words, rhombus is a