MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Notation for describing shapes . Use capital letters in the corners to label the vertices . Use these letters to describe the shape A B This parallelogram can be described as shape ABCD D C . Small lines on the sides of the shape mean those side lengths are equal . Small arrows on the sides of the shape mean those sides are parallel MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Classifying shapes We know what a shape is because of the properties is has . number of sides . equal and/or parallel sides . equal angles . right angles . diagonals that bisect each other . diagonals that are at right angles . line symmetry . rotational symmetry MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 TRIANGLES MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Types of triangles Right angled Isosceles Has a right angle Two equal sides Two equal angles
Equilateral Scalene All sides equal No equal sides All angles equal No equal angles No right angles MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 QUADRILATERALS MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Types of quadrilateral Rectangle Parallelogram Trapezium Kite
Square Rhombus Isosceles trapezium Delta / Arrowhead MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Quadrilateral family tree
QUADRILATERAL
KITE PARALLELOGRAM TRAPEZIUM
RECTANGLE RHOMBUS ISOSCELES DELTA TRAPEZIUM
SQUARE MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 POLYGONS MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4
Equilateral Square Regular Regular Regular Regular Triangle Pentagon Hexagon Heptagon Octagon MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 A polygon is a 2-D shape made when line segments enclose a region.
A An end point is called a vertex. Together they are The line B E called vertices. segments are called sides. C D
2 - D stands for two - dimensional . These two dimensions are length and width. A polygon has no thickness. MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Task – Which of the following are polygons? MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Task – Which of the following are polygons? MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Types of polygons
A regular polygon has equal sides and equal angles.
In a convex polygon all of the interior angles are less than 180°. All regular polygons are convex.
In a concave polygon some of the interior angles are more than 180°. MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Types of polygons Number of sides Name of polygon 3 Triangle 4 Quadrilateral 5 Pentagon 6 Hexagon 7 Heptagon 8 Octagon 9 Nonagon 10 Decagon MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Regular shapes
3 4 5 6
Equilateral Triangle Square Pentagon Hexagon
7 8 9 10
Septagon/Heptagon Octagon Nonagon Decagon
11 12 16 20
Hendecagon Dodecagon Hexadecagon Icosagon MATHSWATCH CLIP Properties of 9, 10, 43, 116, 149 10/06/2020 GRADE shapes 1, 2, 3, 4 Irregular polygons
3 4 5
Triangle Quadrilateral Pentagon
6 7 8
Hexagon Septagon/Heptagon Octagon