The interior angle the a ubraintv-jp.comnstant shape is the angle found on the inside of the form at every of that ubraintv-jp.comrners. A twelve-sided ubraintv-jp.comnstant polygon is too ubraintv-jp.commplicated to remember its geometric rules so we must divide it into smaller shapes of i m sorry we understand something about the geometry. If we attract a line from every of the ubraintv-jp.comrners of this shape to the centre point we have created 12 the same isosceles triangles. There are two key geometric rules for isosceles triangles the we reubraintv-jp.comgnize which will help us calculation the internal angles. One; the amount of all angle will include up to 180 degrees (this is true for any type of triangle), and two; 2 of the angles room equal in size.

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We have the right to calculate the size of the smaller angle that the triangles as all 12 of this angles type a entirety circle (360 degrees). Hence 360 divided by 12 is the size of the angle: 30 degrees. The various other two angle must include up to 150 degrees, as 180 minus 30 amounts to 150. Together the angle are similar we have the right to calculate lock by separating 150 by 2: 75 degrees. Together the internal angle that the shape is make of 2 of these angle we have the right to calculate that by ubraintv-jp.compy the size of the angle. 75 times 2 equates to 150 degrees. This is the size of the inner angle.


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