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nalin [4]
3 years ago
10

HELP PLS Rounded to the nearest tenth, what is the perimeter of the triangle

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
7 0

Answer:

  D.)  11.8 cm

Step-by-step explanation:

The short side has length ...

  5·sin(30°) = 2.5

The long side has length ...

  5·cos(30°) ≈ 4.33

The sum of all side lengths is ...

  5 + 2.5 + 4.33 = 11.83 . . . . cm

The perimeter is about 11.8 cm.

_____

The mnemonic SOH CAH TOA can help you remember the relationship between trig functions and side lengths:

  Sin = Opposite/Hypotenuse   ⇒   Opposite = Hypotenuse × Sin

  Cos = Adjacent/Hypotenuse   ⇒   Adjacent = Hypotenuse × Cos

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