GRADE  8  MATHEMATICS

This week is meant for Section 5.3 Surface Area of a Prism - page 176

Students should read carefully Examples 1 and 2 on pages 177-179 as well as Key Ideas on p. 179.

To find the Surface Area of a Rectangular or Triangular Prism, you need to find the area of each face and then add them up for the total Surface Area. To find the area of each face you need to know and use the area formula for different shapes (rectangle, square, triangle)

Students need to show their work in detail. When labelling the different faces of a prism, use words like: front, back, top, bottom, left, right.

For example # 4 on page 180:

Area front = Length x Width = 14 cm x 12.3 cm = 172.2 cm squared

Area back = same = 172.2 cm squared

Area top = Length x Width = 12.3 cm x 1 cm = 12.3 cm squared

Area bottom = same = 12.3 cm squared

Area right = Length x Width = 14 cm x 1 cm = 14 cm squared

Area left = same = 14 cm squared

Total Surface Area = the sum = 397 cm squared.

Students should show their work in a similar way for all questions.

Practice work for this week: Page 180-181 # 3-13 and page 189 # 13 - 16. This should be done by next Monday. Contact me anytime for help.