Answer:
a = 21
Step-by-step explanation:
The Pythagorean Theorem is a² + b² = c²
So solving for a would give us [tex]a=\sqrt{c^{2}-b^{2} }[/tex]
Now plugging in our values we get [tex]a=\sqrt{(29)^{2}-(20)^{2} }=\sqrt{841-400}=\sqrt{441}=21[/tex]
a = 21
