Question

ABCD is a quadrilateral where A=90° B=2x+4° C=3x-5° D=8x-15°
Find x, B and C

Answer 1

In quadrilateral by angle sum property

A+B+C+D=360

on putting value of a,b,c,d in equation

90+2x+4+3x-5+8x-15=360

on solving
x=22

b=48
and c=61

Answer 2

hey dear!
here is ur answer
......
in quadrilateral ABCD
by angle sum property of quadrilateral
/A+/B+/C+/D=360°
90°+2x+4+3x-5+8x-15=360°
74°+13x=360°
13x=360°-74
13x=286°
x=286/13
x=22°
B=2x+4=2×22+4=48°
C=3x-5=3×22-5=66-5=61°
D=8x-15=8×22-15=176-15=165°

hope this will help you; )