3 years ago

How to find angles in a triangle

Mathematics

1 answer:

zaharov [31]3 years ago

6 0

All of the angles in the triangle add up to 180 degrees.

In a perfect triangle all of the corners are 60

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4) Solve ∆ABC, a = 2.5 cm, c = 3.6 cm, and ∠A = 43°. Begin by sketching and labelling

mezya [45]

The length of b and angle B and C are 3cm, 45 degrees and 79 degrees respectively.

<h3>How to determine the parameters</h3>

To determine the angles and length of sides, we use the sine rule

The sine rule is thus:

$\frac{sin A}{a} = \frac{sin B}{b} = \frac{sin C}{c}$

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c = 3. 6cm

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Let's find angle C

$\frac{sin 43}{2. 5} = \frac{sin C}{3. 6}$

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C = $sin^-^1(0. 982)$

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To find angle B, we have

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Hence, the length of b and angle B and C are 3cm, 45 degrees and 79 degrees respectively.

Learn more about sine rule here:

brainly.com/question/12827625

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