shapes
DESCRIPTION
Mengenal bentuk 2DTRANSCRIPT
shapesshapes
shapesshapes
D stands for DIMENSIONSD stands for DIMENSIONS
The 2 dimensions are :The 2 dimensions are :i.i. Lengths Lengthsii.ii. WidthWidth
Shapes with these 2 dimensions are calledShapes with these 2 dimensions are called2D SHAPES2D SHAPES..
The face of every 2D shapes are The face of every 2D shapes are FLATFLAT..
What are 2D shapes ?
What is a 2D shape ?
L
W
L
W
L
W
L – The length of the shape
W – The width of the shapeThe faces are FLAT.
Face Corner
Straight line
Parts of a 2D shapes
Angle
Face Corner ?
Curve side
Parts of a 2D shapes
x
Anglex
circle
Names of 2D shapes
circle
square
square
triangle
triangle
oval
oval
rectangle
rectangle
pentagon
pentagon
hexagonhexagon heptagonheptagon octagonoctagon
Names of 2D shapes
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
Name : CircleFace : RoundSides : Curve sideCorner : 0Angle : 0
Names of 2D shapes
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
Name : SquareFace : SquareSides : Straight sidesCorner : 4Angle : 4
Names of 2D shapes
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
Name : TriangleFace : TriangularSides : Straight sidesCorner : 3Angle : 3
Names of 2D shapes
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
Name : OvalFace : OvalSides : Curve sideCorner : 0Angle : 0
Names of 2D shapes
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
Name : RectangleFace : RectangularSides : Straight sidesCorner : 4Angle : 4
Names of 2D shapes
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
Name : PentagonFace : PentagonSides : Straight sidesCorner : 5Angle : 5
Names of 2D shapes
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
Name : HexagonFace : HexagonSides : Straight sidesCorner : 6Angle : 6
Names of 2D shapes
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
Name : HeptagonFace : HeptagonSides : Straight sidesCorner : 7Angle : 7
Names of 2D shapes
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
circle square triangle
oval rectangle pentagon
hexagon heptagon octagon
Name : OctagonFace : OctagonSides : Straight sidesCorner : 8Angle : 8
Face Corner
Straight line
Parts of a 2D shapes
Angle
Face Corner
Straight line
Parts of a 2D shapes
Angle
Face Corner ?
Curve side
Parts of a 2D shapes
x
Parts of a 2D shapes
Face Corner
Straight line Angle
Parts of a 2D shapes
Face Corner
Curve side
x
Guess what shape is this
It has 3 straight sides and 3 corners…
Answer : Triangle
Guess what shape is this
It has 4 equal sides and 4 corners…
Answer : Square
Guess what shape is this
It has a round face. It has no
corners…
Answer : Circle
Guess what shape is this
It has 4 corners and 4 sides. 2 of
the sides are longer…
Answer : Rectangle
Fill in the blanks
Name :
Face :
Sides :
Corners :
Square
square
4 equal sides
4
Fill in the blanks
Name :
Face :
Sides :
Corners :
Rectangle
Rectangular
4 straight sides2 sides longer
4
Fill in the blanks
Name :
Face :
Sides :
Corners :
Triangle
Triangular
3 straight sides
3
Fill in the blanks
Name :
Face :
Sides :
Corners :
Circle
Round
A curve side
No corners
Fill in the blanks
Name :
Face :
Sides :
Corners :
Oval
Oval
A curve side
No corners
Characteristic of prisms
Types of 2D shapes ?
There are 2 types of 2D shapes :1. polygon2. non-polygon
Polygons are 2D shapes with only straight sides.
2D shapes which have curved side are
called non-polygons.
What are polygons?
Polygons are 2D shapes with only straight sides.
Examples :Straight lines
What are polygons?
Shapes with curve sides are not polygons.
Examples :Curve sides
State whether these shapes are polygons
Exercise
√ √ x √
√ √ x x
x
√
Are these polygons or non-polygons ?
Answer
Are these polygons or non-polygons ?
√x √
√ x x
shapesshapes
The 3 dimensions are :The 3 dimensions are :i.i. Lengths (L)Lengths (L)ii.ii. Width (W)Width (W)iii.iii. Depth (D)Depth (D)
Shapes with these 3 Shapes with these 3 dimensions are called dimensions are called 3D SHAPES3D SHAPES..
The face of a 3D shapes can be The face of a 3D shapes can be FLAT FLAT or or curvecurve..
What are 3D shapes ?
L
WD
Names of 3D shapes
cube sphere cylinder
cone pyramid
Characteristic of prisms
1. Have at least 2 identical bases
2.Have straight sides
3.Have faces other than the bases in rectangular shapes
Squareprism
Types of 3D shapes
Parts of 3D shapes
Face
Base
Vertex
Edge
Rectangularprism
Types of 3D shapes
Triangularprism
Types of 3D shapes
lineslines&shapesshapes
Are these shapes symmetry?
How to indicate symmetrical shapes
When the shape is cut out in two, are the cutouts the same?
How to indicate symmetrical shapes
same
When the shape is cut out in two, are the cutouts the same?
How to indicate symmetrical shapes
same
When the shape is cut out in two, are the cutouts the same?
How to indicate symmetrical shapes
same
Circle is a symmetrical shape.
How to indicate symmetrical shapes
The symmetry lines are many.
Is a square a symmetrical shape?
How to indicate symmetrical shapes
How to indicate symmetrical shapes
So, is a square a symmetrical shape?
How to indicate symmetrical shapes
yes
How to indicate symmetrical shapes
So, is a triangle a symmetrical shape?
How to indicate symmetrical shapes
yes
State whether these shapes are symmetrical or not
Exercise
√ √ √ √
√ √ √ x
x
x