Question

If P (3,5), Q(4,5) and R(4,6) be any three points, the
angle between PQ and PR is :
(a) 30
(b) 45
(c) 60
(d) 90
​

Answer 1

Step-by-step explanation:

distance between P Q =√(4-3)^2+ (5-5)^2=1

distance between QR=√(4-4)^2+(6-5)^2=1

apply trigo

let angle be β

tanβ=1/1=1

1=45°

angle =45°