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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