Harry_the_cat
Elite Member
- Joined
- Mar 16, 2016
- Messages
- 3,771
A square is a rectangle. Right! I think we all agree on that (although I have argued with students over that.)
Is an equilateral triangle an isosceles triangle?
An isosceles triangle is defined as having two equal length sides.
Does this mean "exactly two" or "at least two"?
In the first case, an equilateral triangle is not isosceles, but in the second case it is.
I've always believed it is, ie an equilateral triangle is a special sort of isosceles triangle, in the same way that a square is a special sort of rectangle.
It all comes down to the definition.
Comments?
Is an equilateral triangle an isosceles triangle?
An isosceles triangle is defined as having two equal length sides.
Does this mean "exactly two" or "at least two"?
In the first case, an equilateral triangle is not isosceles, but in the second case it is.
I've always believed it is, ie an equilateral triangle is a special sort of isosceles triangle, in the same way that a square is a special sort of rectangle.
It all comes down to the definition.
Comments?