The diagram above shows a regular hexagon H3 with area H which has six right triangles inscribed in it. Let the area of the shaded region be S, then what is the ratio H:S?
First of all, the image is below not above
The hexagon is composed of 6 isoceles triangles. In the sketch above, you just have to draw their apothem and then you get 6x2 right-angled triangles. So you have the same little right-angled triangles composing the whole hexagone. Each isoceles triangle has 6 little right-angled triangles and the total is \(\LaTeX\): \(6\text{isoceles}\triangle\times6\text{little right-angled triangle}=36\). You count \(\LaTeX\): \(4\text{little right-angled}\triangle\times2\text{shaded area}=8\text{shaded little right-angled triangles}\). So the ratio is: \(\frac{36}{8}=\frac{9\times4}{2\times4}=\boxed{\frac92}\). And \(\dfrac92=9:2\).
First of all, the image is below not above
The hexagon is composed of 6 isoceles triangles. In the sketch above, you just have to draw their apothem and then you get 6x2 right-angled triangles. So you have the same little right-angled triangles composing the whole hexagone. Each isoceles triangle has 6 little right-angled triangles and the total is \(\LaTeX\): \(6\text{isoceles}\triangle\times6\text{little right-angled triangle}=36\). You count \(\LaTeX\): \(4\text{little right-angled}\triangle\times2\text{shaded area}=8\text{shaded little right-angled triangles}\). So the ratio is: \(\frac{36}{8}=\frac{9\times4}{2\times4}=\boxed{\frac92}\). And \(\dfrac92=9:2\).
If we inscribe the hexagon in a circle, let the radius = R
By AAS we have 8 congruent 30-60-90 right triangles
The side opposite the 60° angle = R/2
And the side opposite the 30° angle = R / ( 2sqrt (3) )
So.....the area of these 8 right triangles is
8 *(1/2) (R/2) (R /(2sqrt (3)) = R^2/sqrt (3)
And the side of the hexagon = R....so its area = 3sqrt (3)R^2 /2
So H / S = 3sqrt(3) R^2 / 2 3 sqrt (3) sqrt (3) 9
_____________ = ______________ = ____
R^2 / sqrt (3) 2 2
Exactly what cryptoaops found !!!!
Good job, cryptoaops !!!!