Find the perimeter of:
AABC in which AB = 7 cm, BC = 12 cm and CA= 10 cm
(ii)
AXYZ in which XY = YZ = ZX = 8 cm
(iii)
AABC in which AB = 4 cm, BC = 5.5 cm and CA = 6 cm
d the length of its sides
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Step-by-step explanation:
area of a triangle is root semi perimeter × semi perimeter minus first side × semi perimeter minus second side × semi perimeter minus third side
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