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Warm Up 12 Proofs and Counterexamples A Day

Last updated almost 3 years ago

3 questions

1

1

1

Question 1

1.

Which of the following is a counterexample of the following statement:
If an angle is obtuse, then the angle measure is 170 degrees.

An angle that measures 70 degrees

An angle that measures 90 degrees

An angle that measures 180 degrees

An angle that measures 120 degrees

Question 2

2.

Which of the following represents the reflexive property?

a=a

If a=b, then b=a

If a=b and b=c, then a=c

Question 3

3.

Which of the following is a counterexample of the following statement:
If you are a boy, then you play football.

A boy who plays football

A girl who plays football

A boy who plays soccer

A girl who plays soccer.