I need help can someone help?

Step-by-step explanation:
Using Pythagoras theorem,
Let the ratio of the sides be x
B²=H²-P²
B²= (25x)²-(21x)²
B²=625x²-441x²
B²=184x²
B=13.56x.
hope this helps you.
Answer:
Your answer is [tex]\sqrt{184}[/tex] or 13.5646599663...
Step-by-step explanation:
[tex]A^{2} +B^{2} =C^{2} \\A^{2} +21^{2} = 25^{2} \\A^{2} = 25^{2} - 21^{2} \\A^{2} = 625-441\\A^{2} = 184\\A = \sqrt{184}[/tex]
Hope this helps!