Question

find the value of the unknown letters in each of the figures given below:

Answer 1

sum of all angles of straight line,
-=angle CPB + angle CPA =180°
-=75° + t =180°
-= t =180°-75°
-= t = 105°
answer is t =105°

Answer 2

Angle CPA and CPB are linear pair.

(linear pair - sum of their angle is 180 degree.)

If angle CPB = 75 degree

than,

CPA = 180-75

CPA = 105 degree

OR

AS THEY ARE LINEAR PAIR

SO,

= t+ 75 = 180

= t = 180-75

= t = 105 degree