21 ANGLES AND PERPENDICULAR LINES

1
2-1 ANGLES AND PERPENDICULAR LINES

• Define
• Protractor
• Half-plane
• Congruent Angle
• Minute

2

• B. Adding and Subtracting Angles
• 23 9 2. 18 45
• - 8 25 23 20

3

• B. Adding and Subtracting Angles
• 23 9 2. 18 45
• - 8 25 23 20

14 44
42 5
4

• C. Find mlt1 and mlt2
• mlt1 x2 5x
• mlt2 x 24
• mlt1 mlt2 x(x10)

5
2-2 SPECIAL ANGLES AND RELATIONSHIPS

• Define
• Right angle 6. Angle bisector
• Acute angle
• Obtuse angle
• Complementary angles
• Supplementary angles

6
2-3 POSTULATES FOR ANGLE MEASURE

• Postulates
• 8
• 9
• B. Theorems
• 2-1
• 2-2

7
2-4 ANNGLE BISECTOR

• Define Angle Bisector
• Theorems
• 2-3
• 2-4

8
2-5 RIGHT ANGLES AND PERPENDICULAR LINES

• Define perpendicular
• Theorems
• 2-5
• 2-6
• 2-7

9
2-6 MORE THEOREMS ABOUT PERPENDICULAR LINES

• Define perpendicular bisector
• Theorems
• 2-8
• 2-9

10
2-7 FORMAL PROOFS

• Define vertical angles
• Theorems
• 2-10
• 2-11
• 2-12

11
2-8 DEMONSTRATION OF A THEORTEM

• Theorems
• 2-13 2-16
• 2-14 2-17
• 2-15 2-18