Question

please answer. .......

Answer 1

hey in diagram ,we say that 12^2=3^2+x^2

144-9=x^2

x^2=135

x=3√15

Answer 2

By pytagorous theorem
H^2=P^2+B^2
B^2=H^2-P^2
B^2=(12)^2-(3)^2
B^2=144-9
B^2=135
B=√135
x=√135