Pentagon

Within a regular pentagon ABCDE point, P is such that the triangle is equilateral ABP. How big is the angle BCP?
Make a sketch.

Final Answer:

x =  66 °

Step-by-step explanation:

φ=360/5=72   α=2180φ=218072=54  β=2 α60=2 5460=48   x=2180β=218048=66



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Tips for related online calculators
Calculation of an equilateral triangle.
See also our trigonometric triangle calculator.

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geometryplanimetricsUnits of physical quantitiesthemes, topicsGrade of the word problem

 
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