Yes! Interestingly enough, the sum of the angles of any four-sided shape equals 360, the same number of degrees in a circle. The sum of the angles of any triangle equals 180, and 180 times two equals 360.
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get a cut out shape of octagon, then get cut out triangles and try to fit in the triangles covering all the octagon but here is the solution... j
cut the angle of a decagon in half the cut angle for equal sides is 30 degrees on each end take 180 degrees divide bt # of sides and this will give you the cut angle for any euqal sided shape
A trapezoid is a 4 sided shape that belongs to the class of polygons known as quadrilaterals
Yes
it's impossible to have a quadrilateral that can't be cut into triangles.