Page 45 - Math E. Booklet prim 4 (first term 2025)_Neat

First: The perimeter of rectangle width Length
Perimeter = W + W + L + L width

Length

First formula Second formula Third formula
(W × 2) + (L × 2) (W + L) × 2 W+W+L +L
For example For example
For example

5 cm 7 cm 10 cm

3 cm 3 cm 5 cm 5 cm 6 cm 6 cm

5 cm 7 cm 10 cm

P = (5×2) + (3×2) P = (7 + 5 ) ×2 P = 10 + 10 + 6 + 6

= 10 + 6 = 16 cm = 12 × 2 = 24 cm = 32 cm

Second: The perimeter of square

10 cm

First formula = S + S + S + S = 10 + 10 + 10 + 10 = 40 cm 10 cm 10 cm
Second formula = S × 4 = 10 × 4 = 40 cm

10 cm

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