Pythagorean Theorem In a right triangle with sides of length a and b and hypotenuse c : a 2 + b 2 = c 2 MA202 Sections 5 & 401 Chapter 12-3 Slides
Proving the Pythagorean Theorem MA202 Sections 5 & 401 Chapter 12-3 Slides
Proving the Pythagorean Theorem MA202 Sections 5 & 401 Chapter 12-3 Slides
Example 12.16 MA202 Sections 5 & 401 Chapter 12-3 Slides
Converse of the Pythagorean Theorem If you have a triangle with sides of length a , b , and c , where a 2 + b 2 = c 2 : then the triangle is a right triangle with hypotenuse the side of length c . MA202 Sections 5 & 401 Chapter 12-3 Slides
Example 12.18 Determine if each of the following is a right triangle: 15 , 17 , 8 MA202 Sections 5 & 401 Chapter 12-3 Slides
Example 12.18 Determine if each of the following is a right triangle: ( Yes, 8 2 + 15 2 = 64 + 225 = 289 = 17 2 ) 15 , 17 , 8 MA202 Sections 5 & 401 Chapter 12-3 Slides
Example 12.18 Determine if each of the following is a right triangle: ( Yes, 8 2 + 15 2 = 64 + 225 = 289 = 17 2 ) 15 , 17 , 8 √ 10 , 5 , 5 3 MA202 Sections 5 & 401 Chapter 12-3 Slides
Example 12.18 Determine if each of the following is a right triangle: ( Yes, 8 2 + 15 2 = 64 + 225 = 289 = 17 2 ) 15 , 17 , 8 √ √ ( Yes, 5 2 + (5 3) 2 = 25 + 75 = 100 = 10 2 ) 10 , 5 , 5 3 MA202 Sections 5 & 401 Chapter 12-3 Slides
Example 12.18 Determine if each of the following is a right triangle: ( Yes, 8 2 + 15 2 = 64 + 225 = 289 = 17 2 ) 15 , 17 , 8 √ √ ( Yes, 5 2 + (5 3) 2 = 25 + 75 = 100 = 10 2 ) 10 , 5 , 5 3 5 , 11 , 12 MA202 Sections 5 & 401 Chapter 12-3 Slides
Example 12.18 Determine if each of the following is a right triangle: ( Yes, 8 2 + 15 2 = 64 + 225 = 289 = 17 2 ) 15 , 17 , 8 √ √ ( Yes, 5 2 + (5 3) 2 = 25 + 75 = 100 = 10 2 ) 10 , 5 , 5 3 ( No, 5 2 + 11 2 = 25 + 121 = 146 � = 12 2 ) 5 , 11 , 12 MA202 Sections 5 & 401 Chapter 12-3 Slides
Class Discussion In a square based right regular pyramid, the height off the square is measured from the center of the square. For some of the homework, remember the formulas for area from the previous section. MA202 Sections 5 & 401 Chapter 12-3 Slides
Class Discussion Solve for x in the following figure: MA202 Sections 5 & 401 Chapter 12-3 Slides
Class Discussion Solve for y in the following figure: MA202 Sections 5 & 401 Chapter 12-3 Slides
Class Discussion Solve for x and y in the following figure: MA202 Sections 5 & 401 Chapter 12-3 Slides
Class Discussion Find the area of the equilateral triangle: MA202 Sections 5 & 401 Chapter 12-3 Slides
Homework Homework 7 (due 4/6/10): Section 12.3 # 2ac, 3, 4ab, 5, 6, 9, 32 Section 12.4 # 2b, 3c, 4d, 5d, 6ab, 19a, 23 MA202 Sections 5 & 401 Chapter 12-3 Slides
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