Question

The length of a side of an equilateral triangle is 40 centimeters.

What is the length of the altitude of the triangle?

Answer 1

34.64 cm

Explanation:

sin 60 =
`(x)/(40)`

sin 60 (40) = x

34.64 = x

equilateral triangles have 60° angles.

sin Ф =
`(opposite)/(hypotenuse)`

hypotenuse is 40. All sides are 40.

x = opposite or height of triangle.