day 02 - surface area of triangular prisms.notebook...day 02 surface area of triangular...
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Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
May 14, 2019
Aim: SWBAT find the surface area of triangular prisms.
Do Now: Take out your homework & Front of Worksheet
Homework: Page 6 (bottom) & Page 7 in the Unit 5C Packet
** Unit 5C Test is Thursday, May 23rd **
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
SA = 6s2
= 6 (6.2)2
= 230.64
SA = 230.64 in2
A = lw A = 10 x 6A = 60
A = lw A = 10 x 6A = 60
SA = top + bottom + front + back + side 1 + side 2 = 60 + 60 + 60 + 60 + 36 + 36 = 312
SA ≈ 312 mm2
side 1/side 2A = lw A = 6 x 6A = 36
top/bottom
front/back
Estimate FIRST!!6.2 6 5.7 6
Top
Front Side
≈ 6
≈ 6
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
A = lw A = 12 x 3A = 36
A = lw A = 12 x 5A = 60
SA = top + bottom + front + back + side 1 + side 2 = 36 + 36 + 60 + 60 + 15 + 15 = 222
SA ≈ 222 in2
side 1/side 2A = lw A = 5 x 3A = 15
top/bottom
front/back
Top
Back
Side
Estimate FIRST!!8.25 8
SA = 6s2
= 6 (8)2
= 384
SA = 384 cm2
≈ 8
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
2B + PH
B = Area of Base
P = Perimeter of the Base
H = Height of Prism
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
https://www.mathsisfun.com/definitions/triangularprism.html
Triangular Prism
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
2 sides of the triangle
are same length so. . .
2 of the rectangles are
the same
1 2 3
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
Area of triangle base
12
12
A = bh
A = (6) (4)
A = 12
Area of rectangles 1 & 2
A = lwA = (8) (5) A = 40
Area of rectangle 3
A = lwA = (8) (6) A = 48
SA = 2 (area triangle base) + rectangle 1 + rectangle 2 + rectangle 3 = 2 (12) + 40 + 40 + 48 = 152 SA = 152 ft2
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
Area of triangle base
12
12
A = bh
A = (6) (4)
A = 12
Area of rectangles 1 & 2
A = lwA = (8) (5) A = 40
Area of rectangle 3
A = lwA = (8) (6) A = 48
SA = 2 (area triangle base) + rectangle 1 + rectangle 2 + rectangle 3 = 2 (12) + 40 + 40 + 48 = 152 SA = 152 ft2
Estimate FIRST!!7.9 8 10.3 1018.5 1912.7 13
triangle base
12
12
A = bh
A = (10)(8)
A = 40
rectangle 1
A = lw
A = (19) (8)
A = 152
rectangle 2
A = lw
A = (10) (19)
A = 190
rectangle 3
A = lw
A = (19) (13)
A = 247
SA = 2 (area triangle base) + rectangle 1 + rectangle 2 + rectangle 3 = 2(40) + 152 + 190 + 247
= 669 SA ≈ 669 cm2
≈ 13
≈ 8≈ 10
≈ 19
Day 02 Surface Area of Triangular Prisms.notebook May 14, 2019
Area of triangle base
12
12
A = bh
A = (9.9) (11.4)
A = 56.43
Area of rectangles 1 & 2
A = lwA = (8.5) (25.2)
A = 214.2
Area of rectangle 3
A = lw
A = (9.9) (25.2)
A = 249.48
SA = 2 (area triangle base) + rectangle 1 + rectangle 2 + rectangle 3
= 2(56.43) + 214.2 + 214.2 + 249.48
= 790.74SA = 790.74 cm2