Answer:
= 20
Explanation:
Using pythagoras theorem
hypotenuse² = opposite² + adjacent²
hypotenuse - longest side of the triangle orthe side where the right angle faces
opposite - the side of the triangle in which the given angle faces
adjacent - the other side of the triangle which isn't the opposite or hypotenuse
hyp² = 12² + 16²
hyp² = 144 + 256
hyp² = 400
hyp = √400
hyp = 20