Answer:
A
Step-by-step explanation:
Use the main trigonometric equality:

Since
you have that

You know that
thus 
and

Answer:
9 inches^2
Step-by-step explanation:
Since a square has the same side lenghts the formula is
A=s*s
A=3*3
A=9
1) 24 = 8a - 2a
24 = 6 a
24/6 = a
2) 5z + 4z = 36
Answer:
Step-by-step explanation:
Answer:
11.1 cm
Step-by-step explanation:
The area of a triangle can be found from the formula ...
A = (1/2)ab·sin(θ)
where "a" and "b" are side lengths, and θ is the angle between those sides.
We can fill in the numbers and solve for the side length. (Here, b=a.)
31 cm² = (1/2)(a)²sin(5π/6) . . . . . . sin(5π/6) = 1/2
124 cm² = a² . . . . . . . . multiply by 4
11.1355 cm ≈ a
The lengths of the equal sides are about 11.1 cm.