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I don't see any triangle below, but the idea is to add the length of all the sides.If it's an isosceles triangle, two of the sides must have the same length.

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7y ago
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7y ago

A triangle - whether isosceles or not - cannot have four different measures of length.

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Q: What is the perimeter of the isosceles triangle shown below 18 units 12 units 21 units 24 units END STUDY SESSION?
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