Answer:
159cm
Step-by-step explanation:
Sum of all sides of triangles is 180
so, 15+6=21
then 180-21=159
it literally gave you the equation lol
y= 6x + 1/2
c^2=a^2+b^2
=7^2+3^2
=49+9
=58
c^2=58
c=
the answer is C=7.62..
