A=((40+64)/2)*18= 936 units^2
Answer:
105,3≈105
Step-by-step explanation:
sin 72°=19/20
sin 72°=100/x
x=(20*100)/19=105,3
x=BC
x- is hypotenuse
i calculated with calculator
What we know:
(Also,
)
What we need to solve:
(This is equal to
)
How you have to subtract
with
to get:

Thus, the answer would be:

What grade math is this ?
Answer:
B: I think
Step-by-step explanation:
correct me if im wrong