Question

T.A. = ( ? + ? - ? √ ?)

Image below

L.A (Lateral Area) is 54

Answer 1

what does T.A. mean?

Answer 2

Total Area

Answer 3

Can't tell what that one 3'' is for is that the base length of the top triangle or the little line segment connecting the bottom triangle and the top triangle

Answer 4

if it is a little bit drawn to scale
I'm thinking it means the 3'' is the base length of the top triangle

Answer 5

if so we can find the area of the top triangle by doing 1/2*base*height(of triangle)
we can find the height of the top triangle using pythagorean theorem
and we can find the area of the bottom rectangle by doing base*height(of the rect)