21. Find the perimeter of the triangle: 60 degrees, 60 degrees,
id="TexFormula1" title="4 \sqrt{15 } " alt="4 \sqrt{15 } " align="absmiddle" class="latex-formula">
1 answer:
Answer:
120+ 4(square root)15
120+15.49=135.49
135.49 is the perimeter
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