3.7 To calculate area

Mathematics

Measurement and time

Area

Educator section

Memorandum

1. A: ± 20 squares = 20 × 25 mm²

B: ± 10 squares = 10 × 25 mm²

Leaner section

Content

Activity: to calculate area [lo 4.8.2]

1. Now determine the area of the following objects by using the “square sheet” method (each square is 5 mm by 5 mm).

a: ___________________________________________________________________

b: ___________________________________________________________________

c: ___________________________________________________________________

d: ___________________________________________________________________

e: ___________________________________________________________________

f: ___________________________________________________________________

g: ___________________________________________________________________

(Discuss the method you used with a friend).

Assessment

Learning Outcome 4: The learner will be able to use appropriate measuring units, instruments and formulae in a variety of contexts.

Assessment Standard 4.8: We know this when the learner investigates and approximates (alone and/or as a member of a group or team):

4.8.2: area of polygons (using square grids) in order to develop rules for calculating the area of squares and rectangles.