A hectagon (or hectogon) is a Polygon with 100 angles.
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A hectagon has 100 sides. It might be confused with a heptagon which has 7 sides.
A trapezium has 4 right angles...Correction: it has 4 angles but they are not right angles. A structure/shape with 4 right angles is a rectangle or square.
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Every triangle has three angles, regardless of what kind of triangle it is.
All the angles in a triangle add up to 180 degrees. With the isoceles triangle, two of the angles must be the same, so you could have these three angles: 50, 50, 80. (50+50+80=180)