What do the “hash marks” indicate on the sides of polygons? Hash marks indicate that those side lengths are congruent. trapezoid triangleĪnswer the following questions. trapezoid triangle parallelogram Work Zone 4. YIELD WORD BANK triangle pentagon rectangle parallelogram right triangle octagon trapezoid square rhombus Higher Grounds Coffee 1. Why can’t parallelograms be classified as rectangles? Parallelograms do not have 4 90 degree angles.Ī parallelogram A rectangle A rhombus A parallelogram 4 congruent sides □ □ Rhombus □ □ Square Why can we classify a square as a rectangle and a rhombus? A square is a parallelogram with 4 right angles (rectangle) A square is a parallelogram with 4 congruent sides (rhombus)ġ3 Trail 3 Classifying 2-Dimensional Figures Higher Grounds ITALIA Work F Two pairs of parallel sides Opposite sides congruent A parallelogram Four 90° angles □ □ □ □ Parallelogram Rectangle By definition, rectangles are considered parallelograms. Quadrilateral with one pair of parallel sides Quadrilateral with no parallel or congruent sides Trapezoid Basic Quadrilateral Let’s classify quadrilaterals from those with the fewest properties to those with the most properties. We classify quadrilaterals based on whether or not they have certain properties: If it contain right angles Right angles = 90 degrees, indicated by a square in the corner We classify quadrilaterals based on whether or not they have certain properties: The number of congruent sides it has Congruent – having the same measure, indicated by hash lines These sides are congruent These sides are congruent We classify quadrilaterals based on whether or not they have certain properties: How many sets of parallel sides it has Parallel Line -Two lines on the same plane that will never cross. All quadrilaterals have: 4 sides 4 angles (that add up to 360°) Properties of Quadrilaterals A main group of polygons are the quadrilaterals. This is an irregular pentagon because some of its sides and angles are not congruent.Ĥ Here is a list of the most basic polygons:Ĭlassifying 2-Dimensional Figures Here is a list of the most basic polygons: 3-sided Triangle 7-sided Septagon Quadrilateral 4-sided 8-sided Octagon Pentagon 5-sided 9-sided Nonagon 6-sided Hexagon 10-sided Decagon Angle arcs indicate angles of the same measure. Congruent – having the same measure Hash marks indicate sides with the same length. This is a regular pentagon because ALL of its sides and angles are congruent. One-dimension Three-dimensionsģ Polygons are either regular or irregular.Ĭlassifying 2-Dimensional Figures Polygons are either regular or irregular. Polygon Two-dimensions Polygon – a two-dimensional shape made up of straight lines that are closed. Two-dimensional – having a width and a height but flat like a piece of paper. Let’s look at some vocabulary terms before we start classifying figures. Presentation on theme: "Classifying Two-Dimensional Figures."- Presentation transcript:
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