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The perimeter of a triangle is 21 cm. Itwo of its sides are 7 cm each, what is the length of the third side? What type of triangle is this?

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Answer: 7 cm on all sides, equilateral triangle

Step-by-step explanation: If two sides of the triangle are of length 7 cm and the perimeter is 21 cm, then the third side added to 7 +7 = 21

Which means third side = 21-7-7=7cm

User David Archibald
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