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If equal quantities are added to equal quantities, the sums are equal.

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Presentation on theme: "If equal quantities are added to equal quantities, the sums are equal."— Presentation transcript:

1 If equal quantities are added to equal quantities, the sums are equal.
Addition Postulate: 2 cm 7 cm A B C D E F G H Geometry Lesson: Addition/Subtraction Postulates

2 Subtraction Postulate:
If equal quantities are subtracted from equal quantities, the differences are equal. Subtraction Postulate: 2 cm 7 cm A B C D E F G H Geometry Lesson: Addition/Subtraction Postulates

3 Given: Ex 1: Prove: A D E F C B Statements Reasons 1) 2) 3) 4) 5) 6)
Addition Postulate Partition Postulate Partition Postulate Substitution Postulate Geometry Lesson: Addition/Subtraction Postulates

4 Given: Ex 2: Prove: D A C E B 1 3 4 2 Statements Reasons 1) 2) 3) 4)
5) 6) Given Given Partition Postulate Partition Postulate Substitution Postulate Subtraction Postulate (5,2) Geometry Lesson: Addition/Subtraction Postulates


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