When you see a picture of a bright source of light, you might have noticed that it looks like a star with a different number of pointy arms, depending on the camera.
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You can learn more about aperture and how to play with it to get more professional-looking pictures with our aperture area calculator.īefore you head out to check that calculator, we want to give you a quick tip/trick. This shutter, or aperture, is always made following a regular polygonal shape, including the octagon shape. In particular, the shutter protects the sensor from exposure to light when the camera is not in use. This innovation makes the octagon calculator the fastest way to calculate any properties of an octagon by a significant margin.Īnother exciting use of octagons is inside photographic cameras. The best feature of this calculator is that it only requires one input to calculate the rest of the values. Now that you know what each parameter means, it is time to see how to use the octagon calculator to obtain the values you are looking for easily.
Area - Space enclosed by the octagon itself.Perimeter - Sum of the length of all the sides of the octagon.Side Length - It is the length of each side of the regular octagon.
First of all, we should look at the different fields and what they mean. Using the octagon calculator isn't too complicated, but just in case someone might have any doubts and for the sake of completeness, let's go over the features and uses of this octagon area calculator. Subtract the area of a right triangle four times from the area of the square.Calculate the sides of the right triangles by using the special right triangles calculator.Calculate the area of the square (the side is 2 * apothem),."How to find the area of a regular octagon with this information?", you might ask. For example, if you imagine an octagon shape inside a square, you can see that the difference is only four right triangles. Apart from using triangles, there are other tricks you can use to calculate the area of an octagon if you don't remember the formula, but they will not work for other polygons. These tricks work for any polygon, e.g., hexagons and any other polygon you can think of, as long as it is regular. You will obtain the total area of the octagon:Īrea of octagon = 8 * base * height / 2 = perimeter * apothem / 2. Since there are as many of these triangles as the polygon has sides (eight for an octagon), you have to multiply the area of this triangle by the number of sides. Note that the base of the triangle is the length of a side of the octagon. The resulting triangle is what is called an isosceles triangle, and its area is:Īs we explained in the triangle area calculator. If you look at the apothem, you can see that it's the height of a triangle made by taking a line from the vertices of the polygon/octagon to the center of it.
A trick to remembering this formula is to understand where it comes from.
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