An equilateral triangle has an altitude of 15 m. what is the perimeter of the triangle?

we know that

In the equilateral triangle every sides and angles are equal 

so

the measure of internal angles is equal to degrees 

see the attached picture to better understand the problem

In the right triangle ABC

where

BC is the altitude (opposite side angle degrees

AB is the hypotenuse

Clear AB

Perimeter of the triangle is equal to

but remember that

so

therefore

the answer is

the answer on e2020 is

10

4/5

3/5

4/3

step-by-step explanation:

yes

step-by-step explanation: