The surface of the triangle count formula
A = b*h*1/2
A - area
b - base
c - height
The 1st triangle
A₁ = b₁*h = 6in * 8in *1/2= 24in²
The 2nd triangle
A₂ b₂*h = 10in * 8in*1/2 = 40in²
The total area of the two triangles is 24in² + 40in² = 64 square inches
I think answer is 9.3 after it’s rounded
use the formula a^2 +b^2=c^2
(25-y) ^2-y^2=25
y=12
x=25-12
x=13
(13,12)