# In Fig. 6.18 each

Given each square is of unit length. Figure contains length of 10 squares and width of 6 squares.

Length of rectangle = AD = BC

Sum of length of side of 10 squares = 10 units

(a) Perimeter of rectangle = 2 × (l + b)

= 2 × (10 + 6)

= 32 units.

(b) Area of rectangle = 10 × 6

= 60 sq.units

(c) The rectangle is divided into 10 equal parts of 6 sq.units.

(d) Perimeter of the figure can be found as follows: Perimeter = 1 + 1+1 +1 +1 +1 +1 +1 +1 +1 +1 +1

= 12 units.

Yes all parts have same perimeter.

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