all about shapes properties of shapes number of sides number of angles number of lines of symmetry...
TRANSCRIPT
All about Shapes
Properties of Shapes
Number of sides
Number of angles
Number of lines of symmetry
Regular or irregular
Right Angles
Parallel lines
Shapes
Quadrilaterals
Triangles
Polygons
Key Words
Regular Shapes
Quadrilaterals
Shapes with 4 sides!
What shape is this?
Quadrilaterals
A Square
Quadrilaterals
How many lines of symmetry does a square have?
1 23
4
Quadrilaterals
Properties of a Square
Has 4 equal sides
Has 4 equal angles
Each angle is a right angle
Has 4 lines of symmetry
Is a regular shape
Quadrilaterals
What shape is this?
Quadrilaterals
A Rectangle
Quadrilaterals
How many lines of symmetry does a rectangle have?
1
2
Quadrilaterals
Properties of a Rectangle
Has 2 pairs of equal sides
Has 4 equal angles
Each angle is a right angle
Has 2 lines of symmetry
Is an irregular shape
Quadrilaterals
What shape is this?
Quadrilaterals
A Parallelogram
Quadrilaterals
How many lines of symmetry does a parallelogram have?
None!
Quadrilaterals
Properties of a Parallelogram
Has 2 pairs of equal sides
Has 2 pairs of equal angles
Opposite sides are parallel
Has NO lines of symmetry
Is an irregular shape
Quadrilaterals
What shape is this?
Quadrilaterals
A Rhombus
Quadrilaterals
How many lines of symmetry does a rhombus have?
21Quadrilaterals
Properties of a Rhombus
Has 4 equal sides
Has 2 pairs of equal angles
Opposite sides are parallel
Has 2 lines of symmetry
Is an irregular shape
Quadrilaterals
What shape is this?
Quadrilaterals
A Trapezoid
Quadrilaterals
How many lines of symmetry does a trapezoid have?
None!
Quadrilaterals
How many lines of symmetry does this trapezoid have ?
1
Because these angles are equal.
Quadrilaterals
Properties of a Trapezoid
Has unequal sides
One pair of opposite sides are parallel
Usually has NO lines of symmetry
Is an irregular shape
Quadrilaterals
What shape is this?
Quadrilaterals
A diamond
Quadrilaterals
How many lines of symmetry does a diamond have?
1Quadrilaterals
Properties of a diamond
Has 2 pairs of equal sides
Has 1 pair of equal angles
Equal sides are adjacent
Has 1 line of symmetry
Is an irregular shape
Quadrilaterals
Quadrilaterals
Shapes with 4 sides!
Quadrilaterals
Triangles
Shapes with 3 sides!
What type of triangle is this?
Triangles
An Equilateral Triangle
Triangles
How many lines of symmetry does an equilateral triangle
have?1
2 3
Triangles
Properties of an Equilateral Triangle
Has 3 equal sides
Has 3 equal angles
Each angle is a 60o angle
Has 3 lines of symmetry
Is a regular shape
Triangles
What type of triangle is this?
Triangles
An Isosceles Triangle
Triangles
How many lines of symmetry does an Isosceles Triangle
have?1
Triangles
Properties of an Isosceles Triangle
Has 2 equal sides
Has 2 equal angles
Has 1 line of symmetry
Is an irregular shape
Triangles
What type of triangle is this?
Triangles
A Scalene Triangle
Triangles
None!
How many lines of symmetry does a scalene triangle have?
Triangles
Properties of an Scalene Triangle
Has NO equal sides
Has NO equal angles
Has NO lines of symmetry
Is an irregular shape
Triangles
What type of triangle is this?
Triangles
A right triangle
Triangles
Properties of a right triangle
Has 1 right angle
May be an isosceles triangle
May have 1 line of symmetry
Is an irregular shape
It will be isosceles and have 1 line of symmetry when these 2
sides are equal.
Triangles
Triangles
Shapes with 3 sides!
Triangles
Key Words
Parallel
Perpendicular
Diagonal
Vertex
Bisect
Regular Shape
Regular Shape
Shapes are regular when
All their angles are the same size
All their sides are the same length
Parallel
Lines are parallel
when they are always the same distance apart.
Perpendicular
Lines are perpendicular
when they meet at right angles.
Vertex
A Vertex is a corner of a shape where two lines meet.
Diagonal
A Diagonal is a straight line that joins one corner (vertex) of a shape to a non adjacent corner (vertex)
Bisect
A line that cuts a shape exactly in half, Bisects the shape
Key Words
Parallel
Perpendicular
Diagonal
Vertex
Bisect
Regular Shape
Polygons
Shapes with many sides!
What shape is this?
Polygons
A Hexagon
Polygons
How many lines of symmetry does a hexagon
have?1 2
3
4
5
6
Polygons
Properties of a Regular Hexagon
Has 6 equal sides
Has 6 equal angles
Has 6 lines of symmetry
Polygons
What shape is this?
Polygons
A Pentagon
Polygons
How many lines of symmetry does a pentagon have?
2
3 4
5
1Polygons
Properties of a Regular Pentagon
Has 5 equal sides
Has 5 equal angles
Has 5 lines of symmetry
Polygons
Polygons
Shapes with many sides!
Polygons
Lines of Symmetry - Look at these shapes
Can you suggest a rule?
Regular shapes
All the sides are the same length
All the angles are equal
Have the same number of lines ofsymmetry as the number of sides
RegularShapes
How many lines of symmetry?
Heptagon Octagon
Look at these shapes
RegularShapes
Lines of symmetry
Heptagon Octagon
7 8
RegularShapes
Lines of symmetry
Heptagon Octagon
7 8
RegularShapes