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drek231 [11]
3 years ago
11

To the nearest degree, find the measure of angle A.

Mathematics
2 answers:
tekilochka [14]3 years ago
7 0

Answer:

26°

Step-by-step explanation:

For a right triangle, we can use trigonometry equations :-

In this case we need to use cosine equation .

cos A = adjacent side / hypotenuse

cos A = 18 / 20

A = cos × 18/20

A = arccos × 18/20

A = 26°

evablogger [386]3 years ago
6 0

Cosine(angle) = adjacent leg/ hypotenuse

Cosine( angle ) = 18/20

Angle = arccos(18/20)

Angle = 26 degrees

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Read 2 more answers
What is the value of x?
m_a_m_a [10]

Answer :

98°

Step by step explanation :

As we can see in figure,

∠F = 53°

∠H = 45°

So,

\:\mathsf{∠FGH\: +\: ∠GHF \:+ \:∠HFG\: = \:180°}

[Angle sum property, which states that the sum of all the angles of a triangle is 180°]

=> ∠FGH + 45° + 53° = 180°

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=> \:\bf\boxed{∠FGH\: =\:82°}

Now,

∠x + ∠FGH = 180°

[linear pair]

=> ∠x = 180° - 82°

=> \:\bf\boxed{∠x\: =\:98°}

<h2><u>Alternative Method :</u></h2>

We know that sum of two opposite interior angles is equal to the exterior angle.

So

∠x = ∠GHF + ∠HFG.

=> ∠x = 45 ° + 53°

=> \:\bf\boxed{∠x\: =\:98°}

Hope this helps!

6 0
2 years ago
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