Question 6 • Mathematical Models with Applications - MA4072 CR
A regular octagon has interior angle (8 − 2) × 180° ÷ 8 = 135°. For copies to meet around a point with no gaps or overlaps, the angle must divide 360° evenly. Since 360° ÷ 135° is not a whole number, regular octagons do not tessellate the plane by themselves. The correct choice is “no; measure of interior angle = 135°.”
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