Revise Compare And Classify 2D Shapes Based On Their .

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Compare and classify 2D shapesbased on their propertiesRevise2D shapes have two dimensions – length andwidth.A polygon is a 2D shape with straight sides.Polygons are compared and classified accordingto the properties of their sides and angles.Triangles have 3 sidesand 3 vertices.The total of the anglesin a triangle is 180 .An equilateraltriangle is aregular polygon.It has sides ofequal lengthand each angleis 60 .Key VocabularyRegular – A polygon that has all sides and angles equal.Parallel – Lines that always stay the same distanceapart and never meet.Adjacent – Angles or sides that are next to each other.A scalene trianglehas no equal sidesor angles.An isoscelestriangle has twosides of equallength and twoangles of equal size.This is a rightangled triangleas one of itsangles is 90 .It is also scalene.This is a rightangled triangleas one of itsangles is 90 . Itis also isosceles.

ReviseA quadrilateral is apolygon with four sides.A square has foursides of equal lengthand four right angles(90 ). A square isalso a rectangle,a rhombus and aparallelogram!Compare and classify 2D shapesbased on their propertiesKey VocabularyRegular – A polygon that has all sides and angles equal.Parallel – Lines that always stay the same distanceapart and never meet.Adjacent – Angles or sides that are next to each other.A rectangle has twopairs of parallel,equal sides and fourright angles. Arectangle is also aparallelogram!A rhombus hasfour sides ofequal length andopposite equalangles.A rhombus is alsoa parallelogram!A parallelogramhas two pairs ofparallel, equalsides andopposite equalangles.This is an isoscelestrapezium as ithas two sides ofequal length andtwo pairs of equalangles.A trapeziumonly has onepair ofoppositeparallel sides.A kite has two pairsof adjacent equalsides and one pair ofopposite equalangles.

Compare and classify 2D shapesbased on their propertiesReviseKey VocabularyRegular – A polygon that has all sides and angles equal.Parallel – Lines that always stay the same distanceapart and never meet.Adjacent – Angles or sides that are next to each other.A regular pentagon has fiveequal sides and five equalangles of 108 .In regular and irregularpentagons, the interior angleswill total 540 .A regular hexagon has six equalsides and six equal angles of 120 .In regular and irregular hexagons,the interior angles will total 720 .A regular heptagon has seven equalsides and seven equal angles.In regular and irregular heptagons,the interior angles will total 900 .A regular octagon has eightequal sides and eight equalangles of 135 .In regular and irregular octagons,the interior angles will total 1080 .

Compare and classify 2D shapesbased on their propertiesQuizHow many of these 2D shapes are polygons?34Correct!Tryagain!5

Compare and classify 2D shapesbased on their propertiesQuizHow many of these 2D shapes are regular polygons?54Correct!Tryagain!6

Compare and classify 2D shapesbased on their propertiesQuizHow many of these 2D shapes are parallelograms?43Correct!Tryagain!1

Compare and classify 2D shapesbased on their propertiesQuizWhat type of triangle is this?EquilateralIsoscelesCorrect!Tryagain!Scalene

Compare and classify 2D shapesbased on their propertiesQuizHow many more sides does a hexagonhave than a rhombus?231Correct!Tryagain!

Compare and classify 2D shapesbased on their propertiesQuizHow many more sides does a nonagonhave than a pentagon?234Correct!Tryagain!

Compare and classify 2D shapesbased on their propertiesQuizHow many fewer sides does a trapeziumhave than a decagon?564Correct!Tryagain!

Compare and classify 2D shapesbased on their propertiesQuizHow many sides are there altogether in aparallelogram, triangle and heptagon?101214Correct!Tryagain!

Compare and classify 2D shapesbased on their propertiesQuizHow many sides are there altogether in a kite,octagon and hexagon?181614Choose another objectiveCorrect!Tryagain!

A polygon is a 2D shape with straight sides. Polygons are compared and classified according to the properties of their sides and angles. Triangles have 3 sides and 3 vertices. The total of the angles in a triangle is 180 . A scalene triangle has no equal sides or angles. This is a right-angled triangle as one of its angles is 90 . It is also .

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