rec ‧ tan ‧ gle /ˈrektæŋɡ ə l/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: Medieval Latin ; Origin: rectangulus 'having a right angle' , from Latin rectus 'right' + angulus 'angle' ]
a shape that has four straight sides, two of which are usually longer than the other two, and four 90° angles at the corners ⇨ square
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THESAURUS
■ types of shapes
▪ square a shape with four straight sides that are equal in length and four angles of 90 degrees
▪ circle a round shape that is like an O
▪ semicircle half a circle
▪ triangle a shape with three straight sides and three angles
▪ rectangle a shape with four straight sides and four angles of 90 degrees
▪ oval a shape like a circle, but that is longer than it is wide
▪ cylinder an object in the shape of a tube
▪ cube a solid object with six equal square sides
▪ pyramid a shape with a square base and four triangular sides that meet in a point at the top
▪ sphere a shape like a ball