HELLO...!!
a = x
b = 21
c = 29
Phytagoras formula: a² + b² = c²
[tex] x^2+(21)^2=(29)^2\\ \\x^2+441=841\\ \\x^2=841-441\\ \\x^2=400\\ \\x=\sqrt{400}\\ \\x=20\quad\Longrightarrow\boxed{\boxed{\mathbb{ANSWER\ \checkmark}}}\\ \\ \\\textbf{HOPE THIS HELPS...!!} [/tex]
