Question

tell the answer of the question below

Answer 1

Answer:

=> Sum of three angles of a ∆=180°

=> sum of two Contiguous angle=180°

Step-by-step explanation:

a+b+c=180° -------(i)

a+y+b+x+c+z=180°+180°+180°=540° ------(ii)

x+y+z=(ii) - (i)=540°-180°=360°

=> x+y+z=2(a+b+c) (proved)

Let,third exterior angle is x

=> sum of other two exterior angles= y+z=210° (given)

x+y+z=360°

=> x=360°-(y+z)=360°-210°=150°