Question

two angle of a quadrilateral are 65 degree and 85 degree and other angle are equal the measure of each equal angle is

Answer 1

angle 65 + angle 85 equal to 150.
Now acc. to angle sum property of a triangle.
65+85-180=30
SO angle 3rd is 30 degree.
now angle 4th is angle 30 + angle 65 + angle 85 - 360 (according to the angle sum property of a quadrilateral )it is equal to the 180.

Answer 2

heya

first angle=65°
second angle=65°
third angle=85°

let the fourth angle be x

sum of all the angles of a quadrilateral is 360°
So,
65°+65°+85°+x=360°
215° +x=360°
x=360°-215°
x=145°

hence,
first angle=65°
second angle=65°
third angle=85°
fourth angle= x = 145°

[check]
{sum of all the angles of a quadrilateral is 360°}
(65°+65°+85°+145°=360°)
(360°=360°)

hope you understand my process