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.
Correct answer:
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You need to know the following knowledge to solve this word math problem:
- planimetrics
- triangle
- trapezoid
- The Law of Cosines
- basic functions
- reason
- goniometry and trigonometry
- cosine
- arccosine
Units of physical quantities:
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