Unit 1 Day 10 TWO COLUMN PROOFS.

Slides:



Advertisements
Similar presentations
Sec 2-6 Concept: Proving statements about segments and angles Objective: Given a statement, prove it as measured by a s.g.
Advertisements

2.6 Prove Statements About Segments and Angles
3.3 Parallel and Perpendicular Lines To Relate Parallel and Perpendicular Lines.
Use right angle congruence
Proving Theorems 2-3.
Lesson 2.6 p. 109 Proving Statements about Angles Goal: to begin two-column proofs about congruent angles.
Introduction to Geometric Proof Logical Reasoning and Conditional Statements.
PROVE STATEMENTS ABOUT SEGMENTS & ANGLES. EXAMPLE 1 Write a two-column proof Write a two-column proof for the situation in Example 4 on page 107. GIVEN:
2.4: Building a System of Geometric Knowledge
Proof Quiz Review 13 Questions…Pay Attention. A postulate is this.
Vocabulary algebraic proof – Made up of algebraic statements two-column proof/formal proof – contains statements and reasons in two columns.
Lesson: 15 – 4 Preparing for Two-Column Proofs
Chapter 2: Reasoning and Proof Prove Angle Pair Relationships.
Use right angle congruence
Objective: To prove and apply theorems about angles Proving Angles Congruent (2-6)
Isosceles Triangle Theorem (Base Angles Theorem)
EXAMPLE 4 Prove a construction Write a proof to verify that the construction for copying an angle is valid. SOLUTION Add BC and EF to the diagram. In the.
4-4 Using Corresponding Parts of Congruent Triangles I can determine whether corresponding parts of triangles are congruent. I can write a two column proof.
Intro to Proofs Unit IC Day 2. Do now Solve for x 5x – 18 = 3x + 2.
Holt McDougal Geometry 2-6 Geometric Proof Write two-column proofs. Prove geometric theorems by using deductive reasoning. Objectives.
USING PROPERTIES FROM ALGEBRA ALGEBRAIC PROPERTIES OF EQUALITY Let a, b, and c be real numbers. SUBTRACTION PROPERTY ADDITION PROPERTY If a = b, then a.
2-6 Prove Statements About Segments and Angles Hubarth Geometry.
2. 6 Prove Statement about Segments and Angles 2
definition of a midpoint
Reasoning in Algebra and Geometry
Write a two-column proof
Lesson 2-5: Algebraic Proofs
2.5 and 2.6 Properties of Equality and Congruence
Chapter 2.6 Algebraic Proof.
Five-Minute Check (over Lesson 2–4) Mathematical Practices Then/Now
Proving Statements about Segments
Section 4-3 Congruent Triangles
Proving Segment Relationships
Chapter 2.6 (Part 1): Prove Statements about Segments and Angles
Use right angle congruence
Give a reason for each statement.
Section 3-2 Properties of Parallel Lines, Calculations.
Use right angle congruence
2.3 Proving Theorems Midpoint & Angle Bisector Theorem
2.5 Proving Statements about Segments and Angles
CONGRUENCE OF ANGLES THEOREM
Topic 2: Reasoning and Proof
Use algebra to write two-column proofs.
2. Definition of congruent segments AB = CD 2.
Lesson 2-5: Algebraic Proofs
CONGRUENCE OF ANGLES THEOREM
Concept.
If an organism is a parasite, then it survives by living on or in a host organism. If a parasite lives in or on a host organism, then it harms its.
2.5 Proving Statements about Segments
Splash Screen.
Vocabulary theorem two-column proof
Geometric Proofs Standards 2i & 2j.
Prove Statements about Segments and Angles
2-5, 6, & 7 Geometric Proofs.
LESSON 2–6 Algebraic Proof.
4-3: Congruent Triangles
Section 3-4 Parallel and Perpendicular lines.
Lesson 2-5: Algebraic Proofs
Splash Screen.
Vocabulary theorem two-column proof
Here we see that point Y is between X and Z:
Objectives Write two-column proofs.
2.7 Proving Segment Relationships
2-6 Prove Statements About Segments and Angles
G6 - Deductive Reasoning
Verifying Segment Relationships
Five-Minute Check (over Lesson 2–4) Mathematical Practices Then/Now
Chapter 2 Reasoning and Proof.
Chapter 2 Reasoning and Proof.
Presentation transcript:

Unit 1 Day 10 TWO COLUMN PROOFS

Statements The left column of a Two Column Proof are Statements of mathematical relationships that start with given information and conclude with the Statement being proved.

Reasons The right column of a Two Column Proof are reasons for the mathematical relationship on the same line. The reasons are based on geometric definitions, properties, and theorems. Properties of parallel lines and angles are given in the following slides.

Definition of Angle Bisector An Angle Bisector is a line that divides an Angle into two equal parts.

Transitive Property of Congruence For any angles A, B,  and  C,      if ∠A≅∠B and ∠B≅∠C, then ∠A≅∠C . If two angles are both congruent to a third angle, then the first two angles are also congruent.

See Mr. H’s Two Column Proofs