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JRLeon Geometry Chapter 9.4 HGSH Lesson 9.4 You have learned that drawing a diagram will help you to solve difficult problems. By now you know to look.

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Presentation on theme: "JRLeon Geometry Chapter 9.4 HGSH Lesson 9.4 You have learned that drawing a diagram will help you to solve difficult problems. By now you know to look."— Presentation transcript:

1 JRLeon Geometry Chapter 9.4 HGSH Lesson 9.4 You have learned that drawing a diagram will help you to solve difficult problems. By now you know to look for many special relationships in your diagrams, such as congruent polygons, parallel lines, and right triangles. What is the longest stick that will fit inside a 24-by-30-by-18-inch box?

2 JRLeon Geometry Chapter 9.4 HGSH Lesson 9.4 A regular hexagonal prism fits perfectly inside a cylindrical box with diameter 6 cm and height 10 cm. What is the surface area of the prism? What is the surface area of the cylinder? 6cm 3cm The Hexagon is made of equilateral/equiangular triangles and this is a 30°- 60°- 90° triangle. 1.5cm r= 3cm 10 cm 6 cm 6 Faces: A = bhn A = (3)(10)(6) A = 180cm 2 A =  r 2 A =  3 2 A = 9  cm 2 Two Bases A = 18  cm 2 Area of the cylinder: 2  rh A =2  (3)(10) A = 60  cm 2 Total A = 18  cm 2 + 60  cm 2 Cylinder SA = 78  cm 2

3 JRLeon Geometry Chapter 9.4 HGSH Lesson 9.5

4 JRLeon Geometry Chapter 9.4 HGSH Lesson 9.5

5 JRLeon Geometry Chapter 9.1-9.2 HGSH Lesson 9.4-9.5

6 JRLeon Geometry Chapter 9.1-9.2 HGSH Lesson 9.4-9.5 Class Work 9.4 Pages 498: problems 1 thru 5 9.5 Pages 504: problems 1 thru 10, 17


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