Mathematical Proofs

Presentation

•

Mathematics

•

9th - 12th Grade

•

Hard

Joseph Anderson

FREE Resource

8 Slides • 6 Questions

Geometric Proofs

Two Column Proofs

What is a Proof?

A Proof is a convincing mathematical argument.

Geometric Proof premises

Definitions
Postulates
Properties
previous proven theorems

Writing a Proof

Justify each logical step with reason.
You can use symbols and abbrev, but they must be clear and able to understand.

Multiple Choice

Give the reason that belongs in the blank labeled 1.

Given

Substitution Property of Equality

4x = 20

Division Property of Equality

Multiple Choice

What is the reason for step #2?

Definition of congruent segments

Definition of congruent angles

Definition of straight angle

Definition of midpoint

Multiple Choice

What is the missing statement in the proof?

Segment Addition Postulate

Segment Multiplication property

Segment Subtraction property

Multiple Choice

Name the property of equality or congruence that justifies going from the first statement to the second statement.

Addition Property

Multiplication Property

Distributive Property

Combine Like Terms

Multiple Choice

What is step 6

Subtraction property of equality

Addition property of equality

Division property of equality

Multiple Choice

What is reason 3?

Addition Property of Equality

Subtraction Property of Equality

Multiplication Property of Equality

Division Property of Equality

Geometric Proofs

Two Column Proofs

Show answer

Auto Play

Slide 1 / 14

SLIDE

Similar Resources on Wayground

10 questions

Solving Systems by Substitution

Presentation

•

8th - 12th Grade

11 questions

Ch. 3 Justification & Similarity Review

Presentation

•

9th - 12th Grade

11 questions

Logarithms to Exponential

Presentation

•

10th - 12th Grade

10 questions

Rational Root Theorem

Presentation

•

9th - 12th Grade

12 questions

Sequence Notation

Presentation

•

9th - 11th Grade

12 questions

Solving Logarithmic Equations

Presentation

•

9th - 12th Grade

12 questions

Asymptotes

Presentation

•

9th - 12th Grade

12 questions

Trigonometric Ratios

Presentation

•

9th - 12th Grade

Popular Resources on Wayground

10 questions

Safety Day 2026 – Student Review

Quiz

•

9th Grade

21 questions

Continents and Oceans

Quiz

•

6th Grade

20 questions

Parts of Speech

Quiz

•

5th Grade

16 questions

Subject & Predicate

Quiz

•

5th Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

12 questions

Map Skills

Quiz

•

3rd Grade

22 questions

Continents and Oceans

Quiz

•

5th Grade

15 questions

Rounding Decimals

Quiz

•

5th Grade

Discover more resources for Mathematics

12 questions

Absolute Value Equations

Quiz

•

9th Grade

20 questions

Function or Not a Function

Quiz

•

8th - 9th Grade

11 questions

Slope from 2 points

Quiz

•

8th - 9th Grade

10 questions

Exploring the Basics of Exponents

Interactive video

•

6th - 10th Grade

10 questions

Solving Absolute Value Equations

Quiz

•

9th Grade

20 questions

Unit 5 Test RSC (25-26)

Quiz

•

10th Grade

18 questions

SB 12.2 Write in point slope form

Quiz

•

9th Grade

12 questions

Identify Rigid Transformations

Quiz

•

8th - 12th Grade