Question

three angles of a Quadrilateral are 55 , 65 and 115 degrees find the FOURTH Angle answer it in step by step

Answer 1

Sum of all angles in a quadrilateral = 360°

Given angles = 55,65,115,x

Take the fourth angle as 'x'

$55 + 65 + 115 + x = 360 \\ 235 +x = 360 \\ x = 360 - 235 \\ x = 125$

The fourth angle is 125

Mark as BRAINLIEST

Answer 2

Answer:

Step-by-step explanation

in a quadilateral the sum of the angles is 360

∴ 55+ 65+ 115 + x = 360

x = 360 - ( 55+65+115)

   = 360 -235

   = 125