Answer:
a = 14.3
Explanation:
Since you have a right triangle you can use the Pythagorean Theorem.
a^2 + b^2 = c^2
we know b and c, so fill them in.
b = 14, c = 20 (this was given in the question)
a^2 + 14^2 = 20^2
simplify the squares.
a^2 + 196 = 400
subtract 196
a^2 = 204
square root both sides.
a = sqrt204
(use a calculator for this part)
a = 14.2828568571
round to the nearest tenth (one decimal place)
a = 14.3