12
=> here's your solution
=> hypotenuse = 13
=> base. = 5
=> we need to find out perpendicular
=> so, we know. h^2 = b^2 + p^2
=> now putting value in this formula
=> p^2 = 13^2 - 5^2
=> p^2 = 169 - 25
=> p^2 = 144
=> p = √144
= >> p = 12
