(19) Uma has a square board of side 18 cm. What is the perimeter of the board ?
(20) The side of a regular hexagon is 5 cm. Find its perimeter.
(21) Find : (i) p + 3 =1 (ii) p - 8 = 5
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Answer:
19) Perimeter of square = Side × 4
Perimeter of square board that Uma has= 18 ×4
=72 cm
20) Perimeter of hexagon = Side × 6
= 5 ×6
= 30 cm
21 ) p= -2
p = -13
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