Question

the three angles of a quadrilateral are 55 degrees 65 degrees105 degrees what is the fourth angle

Answer 1

As we know that the sum of angles of a quadrilateral is 360

Now,  let the remaining angle be x,

x+ 55+65+105 = 360 

x+ 120+105 = 360

x+ 225 = 260

x = 360-225

x =135


Now,

the remaining angle (fourth angle) is 135


i hope this will help you

-by ABHAY

Answer 2

HEYA!!!!

Here is your answer :
____________________________

Sum of all angle in a quadrilateral = 360

Let the fourth angle be x

ATP,

55 + 65 + 105 + x= 360

225 + x = 360

x = 360 - 225

x = 135

HOPE THIS HELPS U...