Question

a=30cm b=40cm c=? what is c?

Answer 1

use pythogoras theorem a^2+b^2=c^2

Answer 2

with some practice you will recognize this as a 3-4-5 right triangle

Answer 3

with everything multiplied by 10

Answer 4

c^2= a^2 +b^2
c^2=30^2+40^2
c^2=900+1600
c^2=\[\sqrt{2500}\]
c=50
is this correct