Geometry Unit 2 Logic &Proofs

The products of any two prime numbers is always odd.

• True

• False; 2

• False; 4

If two angles are complementary, then both angles must be acute.

• True

• False; two acute angles are not always complementary

The square of a number is always larger than the number.

• True

• False; 3

Two lines always intersect at a point.

• True

• False; parallel lines

• False; perpendicular lines

Conjunction is wrote as...

• ^

• v

Disjunction is wrote as...

• ^

• v

A conjunction is true when...

• One is statement is true

• Both statements are true

• One statement is false

• Both statements are false

A disjunction is true when...

• One statement is true

• Both statements are true

• One statement is false

• Both statements are false

When is a conjunction false

• When one of the statements are false

• When both the statements are false

• When only one statement is true

• When both statements are true

When is a disjunction false

• When one statement is false

• When both statements are true

• When one statement is true

• When both statements are false