1 / 5

2-4 Reasoning in Algebra

2-4 Reasoning in Algebra. Ex. 1 Justifying Steps. 1 . angle addition post. 2. substitution 3. simplify 4 . subtraction prop of = 5. division prop of =. Solve for x and justify 1. m<AOB + m<BOC = m<AOC 2. x + 2x + 10 = 139 3. 3x + 10 = 139 4. 3x = 129 5. x = 43. Ex. 1 Cont.

ronan-munoz
Download Presentation

2-4 Reasoning in Algebra

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 2-4 Reasoning in Algebra

  2. Ex. 1 Justifying Steps 1. angle addition post. 2. substitution 3. simplify 4. subtraction prop of = 5. division prop of = • Solve for x and justify • 1. m<AOB + m<BOC = m<AOC • 2. x + 2x + 10 = 139 • 3. 3x + 10 = 139 • 4. 3x = 129 • 5. x = 43

  3. Ex. 1 Cont. • Your practice • Given : LM bisects <KLN • 1. LM bisects <KLN • 2. m<MLN = m<KLM • 3. 4x = 2x + 40 • 4. 2x = 40 • 5. X = 20 • 1. Given • 2. Definition of angle bisector • 3. Substitution • 4. Subt. Prop. Of = • 5. Div. Prop. Of =

  4. Ex. 2 Still Practice Justifying • Given: AC = 21 • 1. AB + BC = AC • 2. 2y + (3y – 9) = 21 • 3. 5y – 9 = 21 • 4. 5y = 30 • y = 6 • 1. Given • 2. Substitution • 3. Simplify • 4. Add. Prop. Of = • 5. Div. Prop. Of =

  5. Ex. 3 Using Prop. Of = and • <K <K • If 2x – 8 = 10, then 2x = 18 • If RS TW and TW PQ, then RS PQ. • If m<A = m<B, then m<B = m<A • Reflexive Prop of • Add. Prop of = • Trans. Prop of • Symm. Prop of =

More Related