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e-lub [12.9K]
2 years ago
12

How to find angle measures of a triangle with side lengths?

Mathematics
1 answer:
PSYCHO15rus [73]2 years ago
4 0
<span>Step 1: Begin by using the cosine rule to find the largest angle.
Step 2: Use the sine rule to find one of the remaining angles.
<span>Step 3: Use the 'sum of internal angles' rule to find the third angle... The sum of the internal angles equals 180º
</span></span>

The sum of the internal angles equals 180º ...

<span>A + B + C = 180º</span>


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What is the area of a regular nonagon with 10 cm sides and an apothem if 6cm?
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Answer:

The area of the nonagon is 270cm²

Step-by-step explanation:

The area of a regular polygon is given by

=  \frac{1}{2} ap

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Stolb23 [73]

Answer:

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4 0
3 years ago
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Step-by-step explanation:

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