For this case we observe that the three angles of the triangle are equal. Also, we have by definition:
A triangle is equilateral, when the three sides have the same length (in addition, the three internal angles measure 60 degrees or
.
Answer:
The three sides have the same length
Well when you reflect over a coordinate it puts the same information on the opposite side, for example:
3,5 reflected now its -3,5

This is because the interest is annually, this means that every year the interest is given over wat you already had + what you earned in interest.
The growth factor is 1.03 (or 3%) and X is after how many years.
You started with 500 and this grows with factor: