Given that ∠abd = 71°, which equation could be used to solve problems involving the relationships between ∠dbc and ∠abc? a) (4a + 12) = (6a + 9) b) 71 = (4a + 12) + (6a + 9) c) (4a + 12) − (6a + 9) = 71 d) (4a + 12) + 71 = (6a + 9)

the answer is a

step-by-step explanation:

because if you put 1 in to the square root of x it equals 300.

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2