Question

Three interior angles of a quadrilateral are 98 degree,72 degree and 105 degree. What is the exterior angle of the fourth angle.

Answer 1

Step-by-step explanation:

LET, THE FOURTH ANGLE=X

THEN,As we know that

the sum of all algle in quadrilateral=360

FIND X=?

Then A/Q

76+54+108+x=360

238+x=360

x=122 degree

Answer 2

Answer :-

let 4th angle be x

then,

x + 72 + 105 + 98 = 360

=> 275 + x = 360

=> x = 360 - 275

=> x = 85

let exterior angle be y

then

85 + y = 180

=> y = 180 - 85

=> y = 95