Dodecagon

Calculate the size of the smaller of the angles determined by lines A1 A4 and A2 A10 in the regular dodecagon A1A2A3. .. A12. Express the result in degrees.

Correct answer:

x =  75 °

Step-by-step explanation:

A1=12360 1=30  A4=12360 4=120  A2=12360 2=60  A10=12360 10=300   s1=2A4A1=212030=45  s2=2A10A2=230060=120   x1=s2s1=12045=75  x2=180x1=18075=105   x=x1=75=75



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Tips to related online calculators
Our vector sum calculator can add two vectors given by their magnitudes and by included angle.
See also our trigonometric triangle calculator.

 
We encourage you to watch this tutorial video on this math problem: video1

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