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Definitions
Definitions
polygon: a closed shape with straight sides
attributes: a quality used to describe a shape
quadrilateral: any 4 sided shape
square: two sets of parallel lines AND four equal sides AND four right angles
rectangle: two sets of parallel lines AND two sets of equal sides AND four right angles
rhombus: two sets of parallel lines AND four equal sides
parallelogram: two sets of parallel lines
trapezoid: one set of parallel lines
right angle: a 90 degree angle (made from perpendicular lines)
acute angle: an angle less than 90 degrees
obtuse angle: an angle greater than 90 degrees
parallel lines: lines that will never, ever touch
intersecting lines: lines that cross forming 4 angles where they meet
perpendicular lines: lines that intersect and form 4 right angles where they meet
Polygons
Polygons
Regular & Irregular POLYGONS
Regular & Irregular POLYGONS
2 Main Attributes:
2 Main Attributes:
Closed shape (water could not spill out of the inside)
Straight sides (no curved lines)
Lines and Angles
Lines and Angles
What makes up a shape?
What makes up a shape?
Shapes are created using lines and angle. There are several different types of lines and angles that are considered "ATTRIBUTES" of the shapes. These attributes help define each shape.
Shapes are created using lines and angle. There are several different types of lines and angles that are considered "ATTRIBUTES" of the shapes. These attributes help define each shape.
Angles to Know:
Angles to Know:
Right Angle
Acute Angle
Obtuse Angle
Lines to Know:
Lines to Know:
Parallel Lines
Perpendicular Lines
Intersecting Lines
Quadrilaterals
Quadrilaterals
What in the world is a QUADRILATERAL?
What in the world is a QUADRILATERAL?
Quadrilaterals are 4 sided polygons. These shapes can be classified by their attributes.
Quadrilaterals are 4 sided polygons. These shapes can be classified by their attributes.
Trapezoids
Trapezoids
4 sided
1 set of parallel lines
Parallelograms
Parallelograms
4 sided
2 sets of parallel lines
Rectangles
Rectangles
4 sided
4 right angles
2 sets of equal sides
2 sets of parallel lines
Squares
Squares
4 sided
4 right angles
4 equal sides
2 sets of parallel lines
Rhombus
Rhombus
4 sided
4 equal sides
2 sets of parallel lines
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