Problem
First name
Alan
School
The Mall
Country
Age
13
1.
3+4+5 = 12
a=3, b=4, c=5
36-6c = ab/2
6=ab/2
12 = ab
2.
5+12+13=30
a=5, b=12, c=13
225 - 15c = ab/2
450-30c = ab
450-390 = ab
therefore ab = 60 = 5 x 12
3.
a=(p/2)^2 - (pc/2)
a=(p^2)/4 - (pc/2)
a=p/2(p/2-c)