1. 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?

2. 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

3. Homework Check

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

5. 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

6. 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.

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

8. Class Example:
Area of Base = ____m²
Volume = ____m³

9. Class Example #2:

10. Homework:
Page 119 – 120 # 1 - 6

11. Reminder:
TEST: Wednesday November 23, 2011