Question

the angle of a qudrilater are 100,78,92 repetively then,find the fourth angle​

Answer 1

Answer:

go. through the pic u can understand

Answer 2

Answer:

The sum of four angles in a quadrilateral is 360°.

Now

Let's the fourth angle be X

100°+78°+92°+X=360°

270°+X=360°

X=360°-270°

x°=90°