The main idea is using the Pythagorean formula to find the length of line segment 
.
Alr so you use the formula 
is already given and is 
and 
is 
So using algebraic rules you'll get 
as:
Now using the formula: 
, you can find the area of tri ABD and CBD which would be 
and 
so add them up and you get 
!
7 I think
Pls mark brainliest
Answer:
~15.31 or 8(✓2)+4 units
Step-by-step explanation:
a²+b²=c²
16+16=c²
c = ✓32 = 4✓2
2(4✓2) + 4(1) = 8✓2 + 4 ≈ 15.31
