Download A Guide to Understanding 3

A Guide to Understanding
3rd-4th Grade Math
Geometry
Solid Figures
 A solid figure is a 3 dimensional shape.
Cube
Square Rectangular
Pyramid
Prism
Sphere
Cylinder
Cone
Polygons
 A polygon is a closed figure with sides that are all line segments.
 Each polygon below is identified by the number of sides.
Polygon
Triangle
Number of sides
3
Quadrilateral
4
Pentagon
5
Hexagon
6
Octagon
8
 There are 4 different quadrilaterals.
 Only a square, rhombus and rectangle are parallelograms.
Trapezoid
Only has one pair
of parallel sides
Square
Has four equal
sides and four
right angles
Parallelograms
Rhombus
Has four equal
sides
Rectangle
Has four right
angles
 The place where the line segments meet is called an angle or vertex.
 The angles in a polygon are called vertices.
Polygon
Number of vertices
Triangle
3
Quadrilateral
4
Pentagon
5
Hexagon
6
Octagon
8
Congruent means same shape and same size.
Similar means same shape but different size.
There are three ways to move a figure without changing its shape or size.
Slide (translation)
Flip (reflection)
Turn (rotation)
► Ι ◄
B→B
▲
►