Question

If the Perimeter of a triangle is 12cm, then its sides measure 3cm, 4cm and _________.

Answer 1

Answer:

5 cm

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Answer 2

Answer:

$perimeter \: of \: triangle = 12 \: cm \\ a + b + c = 12 \\ 3 + 4 + c = 12 \\ 7 + c = 12 \\ c = 12 - 7 \\ c = 5 \: cm \: \\ If \: the \: Perimeter \: of \: a \: triangle \: is \: 12cm, </strong><strong>\</strong><strong>\</strong><strong> </strong><strong>\: then \: its \: sides \: measure \: 3cm, \: 4cm \: and </strong><strong>\</strong><strong>\</strong><strong> </strong><strong>5 \: cm</strong><strong>.</strong><strong>\:$