find the perimeter . total - 4 question
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Step-by-step explanation:
1) perimeter of rectangle = 2(l+b)
= 2 ( 4.2 + 3.8)
= 2 ( 8)
perimeter of rectangle ABCD is 16cm (2×8)
2) perimeter if square = 4×side
= 4 × 3.6dm
= 14.4dm
3) perimeter of an triangle = a+b+c
= 7cm + 10cm + 12cm
= 29cm
4) perimeter of rectangular hexagon = 6x
= 6 × 5.2cm
= 31.2cm
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