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The two sides of an isosceles triangle are 6.2 cm and 12.4 cm long respectively. What is the circumference of this isosceles triangle
It should be considered in two ways:
When 6.2 is the waist and 12.4 is the bottom, then 6.2 + 6.2 = 12.4 does not meet the trilateral relationship, so it should be discarded
When 6.2 is the bottom edge and 12.4 is the waist, it conforms to the trilateral relationship, so the perimeter is 6.2 + 12.4 + 12.4 = 3
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