Understanding quadrilateral

THIS PPT IS ON
UNDERSTANDING
QUADRILATERALS

 What is Quadrilateral ?
 A quadrilateral is a closed figure with four
straight sides. You can make a quadrilateral
by taking (or imagining) anything straight
and thin you might have handy: pens,
toothpicks, chopsticks, etc. A square is one
type of a special quadrilateral. However,
just to make it interesting, try to use four
things that are not all the same length.
Place your objects so that each end of one
touches the end of another. I am going to
use pencils to form my quadrilateral, as you
can see below. I place each pencil tip so
that it touches the eraser of another pencil.
That way, I get a closed figure, meaning
there are no gaps between sides, and no
side extends past the end of another side.
Now we have our quadrilateral with four
straight sides.

Name the Quadrilaterals
1
2 3
4 5 6
Rectangle Irregular Rhombus
Parallelogram Trapezoid Square

1.
 Square: Quadrilateral with four equal sides
and four right angles
(90 degrees)
Indicates equal sides
Box indicates 900 angle

2.
 Rectangle: Quadrilateral with two pairs of
equal sides and four right angles (90 degrees)
Box indicates 900 angle

3.
 Parallelogram: Quadrilateral with opposite
sides that are parallel and of equal length and
opposite angles are equal

4.
 Rhombus: Parallelogram with four equal
sides and opposite angles equal

5.
 Trapezoid: Quadrilateral with one pair of
parallel sides
Parallel sides never meet.

6.
 Irregular shapes: Quadrilateral with no equal
sides and no equal angles

THANK YOU
FROM GOURAV SHARMA
CLASS-8TH D
ROLL NO-41

Understanding quadrilateral

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