Find the measure of an interior angle of a regular dodecagon(12-sided polygon). Hint: Sum = (n-2)180

Step-by-step explanation:

Sum of interior angles in a polygon = 180°(n - 2).

Size of interior angle in a regular polygon

= 180° - 360°/n

= 180° - 360°/12

= 180° - 30°

= 150°.

2^y = ln 5, or   y(ln 2) = ln 5.   solving for y,   y = (ln 5) / (ln 2).   y=5

step-by-step explanation:

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

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