Question

Also need help with this one too please

Answer 1

b=18

a=6√18

Explanation:

tan 45=b/18

by cross multiply

b=tan 45×18

=1×18

=18

find (a) by using pythagora's theorem

a^2=18^2+18^2

=324+324

a^2=648

take square root both sides

√a^2=√648

a=√36×18

a=6√18