Question

Can you help with this, I don't know how to do it

Answer 1

B

Explanation:

Using trig ratios

sin(45) = opposite/hypotenuse

sin(45) = x/210

sqrt(2)/2 = x/210

x = 210sqrt(2)/2

x = 105sqrt(2)

Answer 2

105 sqrt(2) =x

Explanation:

Since this is a right triangle we can use trig functions

so sin theta = opposite side/hypotenuse

sin 45 = x/210

Multiply each side by 210

210 sin 45 = x

We know sin 45 = sqrt(2)/2

210 * sqrt(2)/2 = x

105 sqrt(2) =x