Question 97131
HERE YOU HAVE A RIGHT TRIANGLE WITH THE SIDE OF 3 METERS & THE HYPOTENUSE OF 7 METERS.
USING THE PYTHAGOREAN THEORUM A^2+B^2=C^2 YOU HAVE:
3^2+B^2=7^2
9+B^2=49
B^2=49-9
B62=40
B=SQRT40
B=6.3 METERS LONG.
PROOF
9+6.3^2=49
9+40=49
49=49