Question

Please help with these.

Answer 1

Step-by-step explanation:

4)

AC^2=AB^2+BC^2

AC^2=4^2+3^2

AC^2=25

AC=5

DC^2=AC^2+AD^2

=12^2+5^2

=144+25=169

DC^2=169

DC=13

3)

length of the wire ^2= 9^2+12^2

=81+144

225

so length of the wire =15