Question

Acellus

Find the indicated side of the
triangle.
b
a
30°
12
12
[?]
a
Enter

Answer 1

a =
`(12)/(√(3) )`

Explanation:

Using the tangent ratio in the right triangle and the exact value

tan30° =
`(1)/(√(3) )` , then

tan30° =
`(opposite)/(adjacent)` =
`(a)/(12)` =
`(1)/(√(3) )` ( cross- multiply )

a ×
`√(3)` = 12 ( divide both sides by
`√(3)` )

a =
`(12)/(√(3) )`