+1450 (a) Prove that one regular hexagon, six squares, and six equilateral triangles, all with the same side length, can be assembled to form a regular dodecagon. (Begin with a diagram of course, but you must also show that at all points where two or more polygons "fit" together, the angles add up to the correct amount.)
(b) The distance between two opposite vertices of the dodecagon is 2. Find the area of the dodecagon.
Thanks so much! (Detailed answers are greatly appreciated!)
+128408 Second one.....a (regular) dodecagon is a 12-sided figure
We have twelve congruent triangles......if the distance between two opposite vertices of the dodecagon is 2...then the side of one of these triangles = 1
And the apex angle of each of these triangles = 360° / 12 = 30°....so...the area is just
12 (1/2) (side length of a triangle)^2 * sin (apex angle) =
12 (1/2) (1^2)sin(30°) =
12 (1/2) (1/2) =
12/ 4 =
3 units^2
