Question

The four angles of a quadrilateral are 90, 3x + 15, x + 25 and x + 55. Find x.

Answer 1

Step-by-step explanation:

sum of 4 angles = 360

so 90+3x+15+x+25+x+55= 360

so 5x+185=360

5x= 175

so x= 35

now one angle = 90

second angle = 3×35+ 15

= 120

third angle = 35+25

= 60

fourth anlge = 90