Answer:
I just did it and the answer is 3
Step-by-step explanation:
Marco will need of material to make the kite
we know that
To know how much material Marco will need to make the kite, the area must be calculated.
Remember that the area of the kite is equal to
where
d1 and d2 are the diagonals of the kite
we have
substitute
BC ≈ 8.9 units
Using the cosine ratio in the right triangle
cos36° = = = ( multiply both sides by 11 )
11 × cos36° = BC , then
BC ≈ 8.9 ( to the nearest tenth )