Question

exercitiul 13 numai a) si c)

Answer 1

a) AOC+COB=180 grade

3X+X=180

4X=180

X=180:4

X=45 grade

deci: AOC=3×45=135 grade

COB=45 grade

c) AOC+COD+DOB=180 grade

120+2X+X=180

120+3x=180

3x=180-120

3x=60

x=60:3

x=20 grade

COD=2×20=40 grade

DOB=20 grade