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Geometry Lesson 8'8

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apothem of a square = (s) a = (24) a = 12. LA = (perimeter)(slant ... to figure the apothem use a=3/6s. a = 3/6(7) a 2.0. LA = (perimeter)(slant height) ... – PowerPoint PPT presentation

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Title: Geometry Lesson 8'8


1
Geometry Lesson 8.8
  • Homework Review

2
1
  • LA ½(perimeter)(slant height)
  • LA ½ (7)(9)(23)
  • LA 724.5 u2
  • SA LA1/2ap
  • SA 724.5 ½(9.3)(9)(7)
  • SA 1017.45 u2

3
2
  • LA ½(perimeter)(slant height)
  • LA ½ (7)(4)(9)
  • LA 126 u2
  • SA LA1/2ap
  • SA 126 ½(4.2)(7)(4)
  • SA 184.8 u2

4
3
  • apothem of a square ½(s)
  • a ½(24)
  • a 12
  • LA ½(perimeter)(slant height)
  • LA ½ (24)(4)(9)
  • LA 432 u2
  • SA LA1/2ap
  • SA 432 ½(12)(4)(9)
  • SA 184.8 u2

5
4
  • LA ½(perimeter)(slant height)
  • LA ½ (9)(1)(12)
  • LA 54 u2
  • SA LA1/2ap
  • SA 54 ½(1.4)(9)(1)
  • SA 60.3 u2

6
5
  • to figure the Length of side use a2 b2 c2
  • c2 (1/2c)2 (4v3)2
  • c2 ¼c2 (16)(3)
  • 3/4c2 48
  • c2 64
  • c 8
  • LA ½(perimeter)(slant height)
  • LA ½ (8)(6)(3)
  • LA 72 u2
  • SA LA1/2ap
  • SA 72 ½(4v3)(6)(8)
  • SA 238.3 u2

7
6
  • to figure the Length of side
    LA ½
    (perimeter) (slant height)
  • 125 ½ (s)(5)(10)
  • 125 25s
  • 5 s
  • SA LA1/2ap
  • SA 125 ½(3.4)(5)(5)
  • SA 167.5 u2

8
7
  • to figure the number of sides use
    SA ½ (perimeter) (slant height)
    B
  • 152.8 ½ (2)(n)(9) ½(3.7)(2)(n)
  • 152.8 9n 3.7n
  • 12 n
  • LA ½(perimeter)(slant height)
  • LA ½ (2)(12)(9)
  • LA 108 u2

9
8
  • to figure the apothem use av3/6s
  • a v3/6(7)
  • a 2.0
  • LA ½(perimeter)(slant height)
  • LA ½ (7)(3)(15)
  • LA 157.5 u2
  • SA ½(perimeter)(slant height) B
  • SA ½ (7)(3)(15) ½(2.0)(7)(3)
  • SA 178.7 u2

10
9
  • to figure the number of sides use
  • LA ½(perimeter)(slant height)
  • 132 ½ (5)(s)(11)
  • 3 s
  • to figure the apothem use av3/6s
  • a v3/6(11)
  • a 3.2
  • SA LA B
  • SA 132 ½(3.2)(11)(3)
  • SA 184.4 u2

11
10
  • to figure the slant height use
  • SA ½(perimeter)(slant height) ½ ap
  • 288 ½ (4)(8)(sh) ½ (4.8)(4)(8)
  • 288 16sh 76.8
  • 13.2 sh
  • LA ½(perimeter)(slant height)
  • LA ½(4)(8)(13.2)
  • LA 211.2 u2

12
11
  • LA ½(2pr) (slant height)
  • LA (p)(9)(12)
  • LA 108p u2
  • LA 339.3 u2
  • SA LA B
  • SA 108p p(9)2
  • SA 189p u2
  • SA 593.76 u2

13
12
  • LA ½(2pr) (slant height)
  • LA (p)(5)(4)
  • LA 20p u2
  • LA 62.8 u2
  • SA LA B
  • SA 20p p(5)2
  • SA 45p u2
  • SA 141.37 u2

14
13
  • To find the radius use
  • LA ½(2pr) (slant height)
  • 18p (p)(r)(6)
  • 3 r
  • SA LA B
  • SA 18p p(3)2
  • SA 27p u2
  • SA 84.8 u2

15
14
  • To find the slant height use
  • SA ½(2pr) (slant height) B
  • 220p (p)(10)(sh) p(10)2
  • 120p 10p(sh)
  • 12 slant height
  • LA ½(2pr) (slant height)
  • LA p(10) (12)
  • LA 120p u2
  • SA 377 u2

16
15
  • To find the slant height use
  • LA ½(2pr) (slant height)
  • 112p (p)(4)(sh)
  • 28 slant height
  • SA LA B
  • SA 112p p(4)2
  • SA 128p u2
  • SA 402.12 u2
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