Answer:
1. Converse: If he is a college graduate, then a man is a teacher.
Inverse: If a man is not a teacher, then he is not a college graduate.
Contrapositive: If he is not a college graduate, then a man is not a teacher.
2. Converse: If it has feathers, then an animal is a bird.
Inverse: If an animal is not a bird, then it has no feathers.
Contrapositive: If it has no feathers, then an animal is not a bird.
3. Converse: If they do not intersect, then two lines are parallel.
Inverse: If two lines are not parallel, then they do intersect.
Contrapositive: If they do intersect, then two lines are not parallel
4. Converse: If they lie on the same line, then two points are collinear.
Inverse: If two points are not collinear, then that do not lie on the same line.
Contrapositive: If they do not lie on the same line, then two points are not collinear.
5. Converse: If it has at least two congruent sides, then a triangle is isosceles.
Inverse: If a triangle is not isosceles, then it's has no at least two congruent sides.
Contrapositive: If it has no at least two congruent sides, then a triangle is not isosceles.
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Answers & Comments
Answer:
1. Converse: If he is a college graduate, then a man is a teacher.
Inverse: If a man is not a teacher, then he is not a college graduate.
Contrapositive: If he is not a college graduate, then a man is not a teacher.
2. Converse: If it has feathers, then an animal is a bird.
Inverse: If an animal is not a bird, then it has no feathers.
Contrapositive: If it has no feathers, then an animal is not a bird.
3. Converse: If they do not intersect, then two lines are parallel.
Inverse: If two lines are not parallel, then they do intersect.
Contrapositive: If they do intersect, then two lines are not parallel
4. Converse: If they lie on the same line, then two points are collinear.
Inverse: If two points are not collinear, then that do not lie on the same line.
Contrapositive: If they do not lie on the same line, then two points are not collinear.
5. Converse: If it has at least two congruent sides, then a triangle is isosceles.
Inverse: If a triangle is not isosceles, then it's has no at least two congruent sides.
Contrapositive: If it has no at least two congruent sides, then a triangle is not isosceles.