The side length of an equilateral triangle is 5 centimeters. Find the length of an altitude. Round your answer to the nearest tenth.

The side length of an equilateral triangle whose side length is approximately 4.3 centimeters.

Step-by-step explanation:

By Geometry, we know that each internal angle in equilateral triangles equals 60º. Trigonometrically speaking, we remember that length of the altitude of an equilateral triangle (), in centimeters, is:

(1)

Where is the side length, in centimeters.

If we know that and , then the height of the equilateral triangle is:

The side length of an equilateral triangle whose side length is approximately 4.3 centimeters.

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8