uadrilateral uadrilateral FamilyFamily

e-Lesson by :e-Lesson by : Rashmi KathuriaRashmi Kathuria

Kulachi Hans Raj Model SchoolKulachi Hans Raj Model School

• his e-lesson is designed to his e-lesson is designed to introduce students to introduce students to

quadrilaterals. ncluded in this quadrilaterals. ncluded in this lesson are discussions of lesson are discussions of

parallelograms, rectangles, parallelograms, rectangles, and trapezoids.and trapezoids.

ey! Look here..ey! Look here..We all have We all have 4 sides.4 sides.

uadrilateral?uadrilateral?

It is a geometrical shape having exactly 4 sides. quad means fourand lateral means side .

Activity

xamples from daily lifexamples from daily life

In this picturethe Shape of the sun shade is a Quadrilateral.

ind the quadrilaterals in the ind the quadrilaterals in the following pictures….following pictures….

rapezoidrapezoid

It is a geometrical shape having 4 sides and having one set of parallel sides.

A B

CD

arallelogramarallelogram

•2 sets of parallel sides

•2 sets of congruent sides

•opposite angles equal

•consecutive angles supplementary

•diagonals bisect each other

•diagonals form 2 congruent triangles

ectangleectangle

It has all of the properties of the It has all of the properties of the parallelogram

4 right angles

diagonals are equal

hombushombus

It has all of the properties of the It has all of the properties of the parallelogram

4 congruent sides

diagonals bisect each other at right angles

quarequare

It has all of the properties of the It has all of the properties of the parallelogram AND the AND the rectangle AND the AND the rhombus.

he Kitehe Kite

                                                                         

Hey, it looks like a kite. It has two pairs of sides. Each pair is made up of adjacent sides that are equal in length. The angles are equal where the pairs meet. Diagonals (dashed lines) meet at a right angle, and one of the diagonal bisects (cuts equally in half) the other.

Ready for the quiz?Ready for the quiz?

1. A polygon with four sides is a a) quadrilateral b) triangle c) hexagon2. A quadrilateral with four equal sides and four equal right angles is a a) rectangle b) square c) rhombus3. A quadrilateral with four equal right angles and two sets of parallel opposite sides that are equal. a) rectangle b) square c) rhombus4. A quadrilateral with two sets of parallel opposites sides that are equal. a) parallelogram b) trapezoid c) cube5. A quadrilateral with two sides that are parallel but not equal. a) rhombus b) trapezoid c) square

CKNOWLEDGEMENTCKNOWLEDGEMENT• am thankful to all those who have

encouraged me to make this presentation and specially our Principal Ms. P.Datta for giving us the opportunity to explore creative tools for making teaching/learning more interesting.

• This strategy of teaching/learning is the need of the hour.

• am also thankful to the software providers for allowing me to use UnFreez and G.S.P. by the help of which I am able to make it interactive.

THANKTHANK

YOUYOU