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Tuesday, July 15, 2008

Henry Park Pri Sch 2007 PSLE Math Prelim Q37

In the figure, ABCD is a square of side 8 cm. BE is 2 cm and FC is 3 cm. Find the area of Triangle AEF.


Solution

Area of Square ABCD ----- 8 cm x 8 cm = 64 square cm
Area of Triangle ABE ----- ½ x 8 cm x 2 cm = 8 square cm
Area of Triangle CEF ----- ½ x 3 cm x 6 cm= 9 square cm
Area of Triangle ADF ----- ½ x 5 cm x 8 cm = 20 square cm

Area of Triangle AEF -----
(64 – 8 – 9 – 20) square cm = 27 square cm (Answer)
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3 comments:

  1. Anonymous15 July 2008 at 12:16 pm

    Dear Mr Song

    You may have seen some CA1 and SA1 Maths papers for 2008. Are there any new types of higher order thinking & challenging questions, not found in past exam papers, being asked?

    ReplyDelete
  2. Anonymous15 July 2008 at 2:49 pm

    Dear Mr Song
    I meant P5 and P6 Maths paper for CA1/SA1 2008

    ReplyDelete
  3. Excel Eduservice15 July 2008 at 9:06 pm

    I have not seen all. However those I have do not appear to have any "new" type of Qs from past papers.

    ReplyDelete