the side of a triangle taken in order are each 3 cm long and then the preceding side if the perimeter of the triangle is 81 cm find the length of its side
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Let the first side be a
Second side = a +3
Third side = a +6
Perimeter = a + a + 3 +a + 6
=> 81 = 3a + 9
=> 3a = 72
=> a = 24
First side = 24 cm
Second side = 27 cm
Third side = 30 cm
Second side = a +3
Third side = a +6
Perimeter = a + a + 3 +a + 6
=> 81 = 3a + 9
=> 3a = 72
=> a = 24
First side = 24 cm
Second side = 27 cm
Third side = 30 cm
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