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Perpendicular Lines SECTION 2.5
Definition Perpendicular lines are two lines that intersect to form right angles (90o).
Perpendicular THEOREMPerpendicular lines form adjacent angles.
2x + 10 + x – 7 = 90o 3x + 3 = 90o 3x = 87o x = 29o 2x + 10 x – 7DRAW THIS FIRST 2x + 10
9x – x = 180o 11x – 18 = 180o 11x = 198o x = 18o DRAW THIS FIRST 9x – 18 2x
Name the theorem or state the definition that justifies the statement below.Definition of ⏊ ⏊ Theorem ⏊ Theorem
Now work! Written Exercises Page 58-59 #3 – 12, 18 – 25
PRACTICE PROBLEMS PAGE 57 Classroom Exercises #2-11 Line Song
Proofs & Perpendicular Lines Sec. 3.2 p. 136
Section 9.2 TANGENTS.
Proving Lines Perpendicular Page 4. To prove lines perpendicular: 12 Prove: Given: s t StatementReason 1. Given 2. Two intersecting lines that form congruent.
Do Now: 1. Take out HW. 2. Copy down HW. 3. What are all the theorems we use to prove 2 lines are parallel?
Geometry Section 3.6 Prove Theorems About Perpendicular Lines.
HW #17 pg. 194 #5-7, 15-17, 21, 26, 29. Theorem 3.8 If two lines intersect to form two congruent angles that are a linear pair, then the lines must.
Prove Theorems About Perpendicular Lines
Notes on Logic Continued
CHAPTER 3: PARALLEL LINES AND PLANES Section 3-1: Definitions.
6.3 Parallel Plane Facts Objectives: 1.Recognize lines parallel to planes, parallel lines and skew lines 2.Use properties relating parallel planes and.
Use right angle congruence
Ch 5.3 Use Angle bisectors of triangles. In this section… We will use the properties of an angle bisector to solve for missing side lengths.
Honors Geometry Section 4.6 (1) Conditions for Special Quadrilaterals
CHAPTER 1: Points, Lines, Planes, and Angles
Section 8.4 Special Right Triangles VERY VERY VERY VERY IMPORTANT SAT SECTION.
CHAPTER 2: DEDUCTIVE REASONING Section 2-4 A: Special Pairs of Angles.
Conjectures that lead to Theorems 2.5
2.2 Definition and Biconditional Statements Use definitions and biconditional statements.
Section 3.2 Properties of Parallel Lines. If two parallel lines are cut by a transversal, then Alternate interior angles (AIAs) are Alternate exterior.
WARM UP 1) 2). Section 9.6 Other Angles OTHER Angles in a Circle You know two types of Angles: –Central angles –Inscribed angles FOUR OTHER TYPES 1)
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