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In a certain triangle, one side has a measure of 18 and another side has a measure of 21. If the triangle is isosceles, then which of the following could be the measure of the third side? A. 18 B. 15 C. 39 D. 3 Reset Submit

Sagot :

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Answer:

18

Step-by-step explanation:

in an isosceles triangle, two of the sides are the same

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