Answer:
20
Explanation:
its a special right triangle
pythagorean triple
its dimensions are 20 21 & 29
some of others are : (3, 4, 5), (5, 12, 13), (7, 24, 25), (20, 21, 29), (9, 40, 41), (11, 60, 61), (13, 84, 85), (15, 112, 113)
wlfrmalpha
9.5m questions
12.2m answers