I need help with this

Answer:
1. x= 12.20
2. x= 8.94
3. x= 31.80
Step-by-step explanation:
1.
H =x , P = 7 and B = 10
using pythagoras theorem
H = 12.20
2.
H =21 , P = x and B = 19
using pythagoras theorem
P = 8.94
3.
H =x , P = 15.09 and B = 28
using pythagoras theorem
P = 31.80