 # Is this right? Challenge

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Is this right? Challenge
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) 6cm 6cm 5cm 12 cm 7cm Is this right?

Your Turn……… Given: a = 7cm b = 8cm c = 11cm height = 7.5cm
length = 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 Your Turn……… 9 cm 7 cm 7.5 cm 11 cm 8 cm

Homework Check

Introduction to 3.4: Volume of Triangular Prism
Lesson 11 – Friday November 18 100mins

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 = _________ Recall

Activity Number everyone 1 to 4
Give students a net for a triangular prism Students 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.

Formula to calculate VOLUME
Define Volume: __________________________________________________________________________ Formula to calculate VOLUME Of a Triangular Prism

Class Example: Area of Base = ____m² Volume = ____m³

Class Example #2:

Homework: Page 119 – 120 # 1 - 6

Reminder: TEST: Wednesday November 23, 2011