Perimeter of a triangle = sum of three sides.
(i) Perimeter = 6 + 5 + 2 cm = 13 cm
p = 13 cm
(ii) Perimeter = (side 1 + side 2 + side 3) m
17 = (side 1 + 8 + 3) m
17 m = (side 1 + 11) m
side 1 = 17 – 11 = 6m
(iii) Perimeter = side 1 + side 2 + side 3
28 feet = 11 feet + side 2 + 9 feet
28 ft = 20 feet + side 2
28 – 20 = side 2
side = 8 feet
Tabulating the unknowns.
