What is the value of y in this equilateral triangle? (Brainly + Bonus points for the correct answer and best-explained answer)

What is the value of y in this equilateral triangle Brainly Bonus points for the correct answer and bestexplained answer class=

Respuesta :

Answer:

y = 15

Step-by-step explanation:

this is an equilateral (therefore also equiangular) triangle

also known as a 60-60-60° triangle

each angle is 60° so you can set up this equation to solve for 'y'

5y - 15 = 60

5y = 75

y = 15