find third and third side of triangle whose sum two sides are 15 cm and 18 cm and perimeter is 45 cm
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the third side is 12cm
expert17:
correct
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perimeter of triangle=sum of all sides
45 =15 +18 +x
45 =33+x
45_33=×
12=×
the third side of triangle is12
45 =15 +18 +x
45 =33+x
45_33=×
12=×
the third side of triangle is12
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