Answer:
29
Explanation:
Applying Pythagorean Theorem :
⇒ MA² = MX² + AX²
⇒ MA² = 20² + 21²
⇒ MA² = 400 + 441
⇒ MA = √841
⇒ MA = 29
MA²=MX²+AX²
=20²+21²
=400+441
=841
MA=√841=29
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