CBSE · Class 6-12

Class 8 · Ganita Prakash

Unit 4 · Class 8Ganita Prakash

Quadrilaterals

Sides, angles, properties of quadrilaterals.

Lessons

3 concepts

1
Angle Sum
Split quadrilateral into 2 triangles by a diagonal. Each triangle: $180°$ . Total: $360°$ .
2
Parallelograms
Opposite sides equal & parallel. Opposite angles equal. Consecutive angles supplementary. Diagonals bisect.
3
Special Cases
Rectangle: parallelogram with all $90°$ angles. Rhombus: parallelogram with all sides equal. Square: rectangle AND rhombus.

Skills to practise

Skill · medium

Quadrilaterals — Practice