objectives
DESCRIPTION
Material Taken From: Mathematics for the international student Mathematical Studies SL Mal Coad , Glen Whiffen , John Owen, Robert Haese , Sandra Haese and Mark Bruce Haese and Haese Publications, 2004. Objectives. To find the area of a closed figure To find the surface area of a 3D. - PowerPoint PPT PresentationTRANSCRIPT
Material Taken From:
Mathematicsfor the international student
Mathematical Studies SL
Mal Coad, Glen Whiffen, John Owen, Robert Haese, Sandra Haese and Mark Bruce
Haese and Haese Publications, 2004
Objectives
• To find the area of a closed figure• To find the surface area of a 3D
Find the area of:
3) 4)
Chapter 11 – Section C – Area- Area formulae found on page 365 -
Find the area of:
5) 6)
Find the area of:
7) 8)
Find the area of:
9) 10)
11) A 15m by 8m rectangular garden consists of a lawn with an inner rectangle (7m × 4m) of
flowers. Find the area of the lawn.
1) A triangular advertising sign has base 1.6 m and area 2 m2. Find its height.
Chapter 11 – Section D – Word Problems
2) A rectangular lawn is 12 m by 8 m and a 3.2 m square garden bed is dug out of the lawn. The
lawn is then reseeded with boxes of seed, where each box costs $8.50 and covers 18 m2. Find:
a)the area of the lawnb)the number of boxes of seed requiredc)the total cost of the seed.
Solids with Plane Faces• Surface area of a solid with plane faces is the
sum of the areas of the faces.
Chapter 11 – Section E – Surface Area
1) Find the surface area of the rectangular prism:
Cylinder Cone Sphere
Objects with curved surfaces
22 2SA rh r 2SA rs r 24SA r
3) Find, the surface area of:
4) Find the outer surface area of:
5) The length of a hollow pipe is three times its radius. If its surface area is 301.6 m2, find its radius.
Homework
• 11C.2, pg 366– #1c, 2a, 4b, 6c
• 11C.3 pg 368– #1b
• 11C.4, pg 369– #1bc, 3ac
• 11D, pg 370– #2b, 5, 7
• 11E. 1, pg 375– #1b, 2, 4
• 11E.2, pg 376– #1cdf, 6