Transcript Measurement, Area, Perimeter

Measurement, Area, Perimeter
New Vocabulary Word
Ray
Rays have endpoints.
Rays continue in one direction.
Rays can go in any direction.
Measurement, Area, Perimeter
Old Vocabulary Word
Line
Lines have no endpoints.
Lines continue in both directions.
Lines can go in any direction.
Measurement, Area, Perimeter
There are two important types of lines:
Parallel lines-These are lines who run in the same directions
but NEVER meet!!!
These are all sets of parallel lines.
None of these sets are parallel lines.
Measurement, Area, Perimeter
Intersecting Lines:Lines that cross or will
cross.
All of these lines are intersecting lines
Measurement, Area, Perimeter
Right angles form square corners
Measurement, Area, Perimeter
Some angles are less than right angles
Measurement, Area, Perimeter
Some angles are greater than right angles
Measurement, Area, Perimeter
Angles can be seen in many objects
Can you find a right angle?
How about an angle greater than a right
angle? Less than a right angle?
Measurement, Area, Perimeter
Today we will make 1 line, 1line segment, 1 ray and 3 angles.
Use blue paper for the straight parts
Use yellow paper for the arrows
Use green paper for the points
Glue them on to the black paper
Show all three types of angles
Measurement, Area, Perimeter
Rectangles
Shapes: Polygons
Triangles
Question: How many sides in a rectangle? A Triangle?
Question: How many angles in a rectangle? A Triangle?
Measurement, Area, Perimeter
Rectangles
Shapes: Polygons
Triangles
Answers: There are 4 sides in a rectangle and 3 sides in a Triangle.
There are 4 angles in a rectangle and 3 angles in a Triangle.
Measurement, Area, Perimeter
Measurement: Unit of Measurement
A unit of measurement is a distance between
two points.
We agree to use certain distances to measure things.
Once we agree on a unit, we give it a name.
Meter
Foot
Inch
Centimeter
Measurement, Area, Perimeter
Measurement: Unit of Measurement
A unit of measurement is a distance between
two points.
We agree to use certain distances to measure things.
Foot
Inches
Meters
Centimeters
Units with the same name are equal to each other
Every foot is the same length: 12 inches
Every meter is the same length: 100 centimeters
Every inch is the same length as every other inch
Measurement, Area, Perimeter
1
1
1
1
1 + 1+ 1 + 1 = 4
Measurement, Area, Perimeter
1
1
1
1
Perimeter of 4