Answer :
by using pythagorean theorem
a^2+b^2 = C^2
16^2+21^2=d^2
256+784=d^2
1040=d^2
sqrt 1040=sqrtd^2
=32.25
hope this helps
a^2+b^2 = C^2
16^2+21^2=d^2
256+784=d^2
1040=d^2
sqrt 1040=sqrtd^2
=32.25
hope this helps