Question

Diana read the following conditional statement.
If a triangle has at least two congruent sides, then it is an isosceles triangle.
Which of the following statements is the contrapositive of the conditional
statement above?
A If a triangle is not an isosceles triangle, then it has at least two congruent sides.
B If a triangle is not an isosceles triangle, then it does not have at least
two congruent sides.
C If a triangle does not have at least two congruent sides, then it is not an
isosceles triangle.
D If a triangle is isosceles, then it has at least two congruent sides

Answer 1

Given statement: If A then B
Contrapositive: if ~B then ~A.
In the above example,
proposition A is "If a triangle has at least two congruent sides", and
proposition B is "The triangle is isosceles".