Proving Lines Parallel Objective : SWBAT determine if two lines are parallel (3.3) *hw/hw log/storybook/workbook p. 67/dry erase board & pen Homework (day 12)- check odd answers in text: p. 160 (7, 10, 12-29) Bring Graph paper- Leave in notebook Quiz next block/Grade storybook p. 12 Pearson Success due Friday Warm-Up: worksheet 1-17
Copy and complete, then put behind your SOL divider (day 12)
Copy This into your SOL Binder (G.2A)- day 12 Given: a ll c What is the value of x ? x = 105 Is b ll c ? Why or why not? No, because there are no congruent corresponding, alternate interior, or alternate exterior angles. Is d ll e ? Why or why not? No, because there are no congruent corresponding, alternate interior, or alternate exterior angles. 85° x°x° 105°
Copy this into your SOL BINDER (G.2A)- day 12 Given: a ll b and d ll e Find the values of x, y, and z. x = 73 y = 107 z = ° x° 117° y° a b c d e z°
Day 12 Notes- copy this into your notebook please Answer questions on Unit 1 Test……… 5) In a plane, if lines are perpendicular to the same line // lines
Dry Erase Activity On your dry erase board, write one of the following: vocabulary word, Algebra I property, Geometry concept or Theorem. Ask a neighboring partner to define what you wrote on the back of their dry erase board. Then choose a second group of two to check your answers; if you are unsure, ask me!
Two Column Proofs: Every Statement must have a reason and vice-versa (these are justifications). Statements |Reasons (justifying the statement) Theorems (VARC), Properties (transitive, reflexive, symmetric, distributive) Vocabulary: complementary, supplementary, congruent, midpoint, etc. Postulates: angle bisector, segment addition, // postulate, Perpendicular postulate GIVEN
State which lines, if any, are parallel. Justify.
Lesson 2-5: Proving Lines Parallel15 Proving Lines Parallel If two lines are cut by a transversal and corresponding angles are congruent, AB // CD.
Lesson 2-5: Proving Lines Parallel16 Proving Lines Parallel If two lines are cut by a transversal and alternate interior angles are congruent, AB // CD.
Lesson 2-5: Proving Lines Parallel17 Proving Lines Parallel If two lines are cut by a transversal and Alternate exterior angles are congruent, AB // CD.
Lesson 2-5: Proving Lines Parallel18 Proving Lines Parallel - Postulates &Theorems If two lines are cut by a transversal and consecutive interior angles are supplementary AB // CD.
Homework Answers (day 12) (odd answers are in your textbook)- please check them!!