Write the contrapositive of the following statement:
If a triangle is equilateral,it is isosceles.
If a triangle is equilateral,it is isosceles.
- AIf a triangle is not isosceles,then it is not equilateral.
- BIf a triangle is isosceles,then it is equilateral.
- CIf a triangle is not equilateral,then it is not isosceles.
- D$A$ triangle is equilateral if and only if it is isosceles.
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