Page 106 - Revised Maths Wisdom Class - 6

104 MATHS

COGNITIVE

MAP

Lines and Angles

Perpendicular Lines
Two lines are said to be m
perpendicular if they 90°
intersect at 90°. l

Perpendicular Bisector

Here P
AO = BO 90°
∠POB = 90° A O B Classification of Angles
So, PQ is the perpendicular If θ = 0 [zero angle] P
bisector of AB Q
If θ = 90° [Right angle] θ
O Q
If θ = 180° [Straight angle]
If θ = 360° [Complete angle]

If 0 < θ < 90° [Acute angle]
If 90° < θ < 180° [Obtuse angle]

If 180° < θ < 360° [Reflex angle]