# Reason + The Law of Cosines - practice problems

#### Number of problems found: 3

- Circular railway

The railway connects in a circular arc the points A, B, and C, whose distances are | AB | = 30 km, AC = 95 km, BC | = 70 km. How long will the track from A to C? - Four sides of trapezoid

In the trapezoid ABCD is |AB| = 73.6 mm; |BC| = 57 mm; |CD| = 60 mm; |AD| = 58.6 mm. Calculate the size of its interior angles. - Triangle ABC

Triangle ABC has side lengths m-1, m-2, m-3. What has to be m to be triangle a) rectangular b) acute-angled?

We apologize, but in this category are not a lot of examples.

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Cosine rule uses trigonometric SAS triangle calculator. Reason - practice problems. The Law of Cosines - practice problems.