A square in a triangle. i need help finding the area

if you need just tell me and i will come to the rescue.

step-by-step explanation:

what

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

the answer is 54 sq. ft. i just did this question, on odyssey ware, and it was right. make brainliest.