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Yuliya22 [10]
2 years ago
15

Find the perimeter of the triangle? what does 2 represent in the triangle?​

Mathematics
2 answers:
sergij07 [2.7K]2 years ago
3 0

Answer:

i  got  11.8 and what do  u mean by the 2, do u mean the 2 strokes, that means that  they  are equal

Step-by-step explanation:

skelet666 [1.2K]2 years ago
3 0

Answer:

6 + 5\sqrt{5}

Step-by-step explanation:

Since the triangle is isosceles then the 2 marked sides are congruent.

Using the rule of radicals

\sqrt{a} × \sqrt{b} ⇔ \sqrt{ab}

Thus perimeter (P) is the sum of the 3 sides

P = \sqrt{20} + 3 + \sqrt{20} + 3 + \sqrt{5}

  = 2\sqrt{20} + 6 + \sqrt{5}

  = 2(\sqrt{4(5)} ) + 6 + \sqrt{5}

  = 2 ( \sqrt{4} ×  \sqrt{5} ) + 6 + \sqrt{5}

  = 2(2\sqrt{5} ) + 6 + \sqrt{5}

  = 4\sqrt{5} + 6 + \sqrt{5}

  = 6 + 5\sqrt{5}

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