Is every isosceles triangle equilateral? is every equilateral triangle isosceles? explain

Hello There!

Not every isosceles triangle is equilateral.
This is because they don't always have equal angles.
The definition of an equilateral triangle is a triangle with all equal angles.
However, every equilateral is an isosceles.
This is because it would have at least 2 sides of equal length.
The definition if an isosceles triangle is a triangle with at least two equal side lengths.

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B.the point lies directly on the regression