Diagonal [dahy-ag-uh-nl]
Noun
A diagonal is a straight line inside a shape that goes from one vertex to another (cannot intersect an edge). When we join two vertices of a polygon which isn't already joined by an edge, we get a diagonal.
Noun
A diagonal is a straight line inside a shape that goes from one vertex to another (cannot intersect an edge). When we join two vertices of a polygon which isn't already joined by an edge, we get a diagonal.
*Both dotted lines are indeed diagonals
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