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Challenge
5cm6cm
6cm
12 cm
7cm
Solution: SA = (b x h) + (a x l) + (b x l) + (c x l)SA = (6cm X 5cm) + (7cm X 5cm) + (6cm X 12cm) + (6cm X 12cm)
Your Turn………
8 cm
9 cm7 cm
11 cm
7.5 cm
Given: a = 7cmb = 8cmc = 11cmheight = 7.5cmlength = 9cm
Required: Surface Area of Triangular Prism
Analysis: SA = (b x h) + (a x l) + (b x l) + (c x l)
Solution:SA = (8cm x 7.5cm) + (7cm x 8cm) + (8cm x 9cm) + (11cm x 9cm)=
Paraphrase: Therefore the Surface Area of this Triangular Prism is 277 cm³
Homework Check
Lesson 11 – Friday November 18
100mins
Introduction to 3.4: Volume of Triangular
Prism
Recall Area of a triangle is
1/2 (base X height)Which is one half the area of a rectangle
To calculate Volume of a Rectangular prism Volume = _________
http://www.youtube.com/watch?v=g2UnCcmoabY&feature=fvsr
http://www.mathsnet.net/geometry/solid/houses1.html
ActivityNumber everyone 1 to 4Give students a net for a triangular prismStudents are to create a rectangular prism
that would fit the triangular prism. Come up with a way to calculate the volume
of the triangular prism based on what you know about the area of a triangle and rectangle and volume of rectangular prism
You are not allowed to use your textbook for aid.
Write down your thoughts of how you came up with the formulas.
Define Volume: __________________________________________________________________________
Class Example:
Area of Base = ____m²Volume = ____m³
Class Example #2:
Homework:
Page 119 – 120 # 1 - 6
Reminder:
TEST: Wednesday November 23, 2011