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Deductive Reasoning - Law of Detachment - Law of Syllogism

Worksheet (Geometry)

PDF: Geometry - deductive reasoning, law of detachment

Deductive Reasoning - Law of Detachment - Law of Syllogism Worksheet


Problems require students to use the law of detachment (If p&q is a true statement and p is true, then q is true) and the law of syllogism (If p&q and q&r are true statements, then p&r is a true statement) to draw conclusions from given statements.

Lesson: 

2. To use the law of detachment and syllogism to draw conclusions.

Subject: 

Number of Problems: 

9

Pages: 

3

Answer Key: 

Yes

Samples: 

Tutor-USA.com Worksheet
Geometry
Law of Detachment – Law of Syllogism

1) The law of detachment states that if a conditional is true and its hypothesis is true, then its ______ must also be true.

Use the Law of Detachment to draw a conclusion if possible.

2) If two lines are parallel, then they do not intersect Line a is parallel to line b.

3) If three points lie on the same line, then they are collinear.

Points A, B, and C lie on line l.

4) If the measures of two angles have a sum of 90 degrees, then the angles are complementary.
m∠1+ m∠2 = 90

5) If two figures are congruent, then their areas are equal.
The area of ABCD equals the area of WXYZ

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