Hexagon Area; Octagon Area; Round Area; Diagonal Area
@debbie he's done 1,000 exams? That's a sheesh moment
Trapezoid Lengths; Angles in Circles; Chord Distances; Cyclic Quadrilateral
How do we know that the two horizontal lines are parallel? They looked parallel but the question does not tell us it is.
Tangency; Tangent Angles; Common Tangents; Inscribed Circle
Why, for the angle we found to be 140 degrees, is its arc also 140 degrees? Shouldn't it be twice as large, 280 degrees?
Angle Bisector; Shortest Paths; Triangle Sides; Amazing Triangle Area
and that's why you can't divide by zero 🙂 if you divide both sides by (5-5) its dividing by zero, which breaks math
@punctualmoose PAB is similar to PCD because
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@iamnotawhale Way to go!! That's a pretty fast solution, nice job for thinking about A = rs.
@RZ923 This was intentional; "facet" refers to the many sides of something, as in the many ways of looking at geometry problems and strategies. Thanks for your comment and for noticing! 🙂