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NAME: Math-7 NOTES DATE: ______/_______/_______ What: Quadrilaterals Why: To introduce basic geometry vocabulary and focus on quadrilateral relationships. Essential Vocabulary Congruent– objects that are the __________ size and shape. Line— goes ________________ in both directions. (⟷ ) Ray— goes forever in _________ direction. ( ⟶ ) Line Segment– has both a beginning and an _______. ( ) Parallel Lines– two or more lines that will never ________________ . ( I I ) Perpendicular – two line segments/ lines that meet in such a way that ___________ angles are formed. (┴) Vertex — __________ where two line segments meet. Angle— formed when two _________ come together at the same vertex Acute Angle— measures ________ than ______ . Obtuse Angle–measures ________ than ______ . Right Angle– measures exactly ______ . Polygon— simple, closed figure formed by _____ or more line ________________ . Polygons are NOT __________ . Triangle — _____ sides. Quadrilateral — _____ sides. Pentagon — _____ sides. Hexagon— _____ sides. Heptagon — _____ sides. Octagon — _____ sides. Nonagon — _____ sides. Decagon — _____ sides. Adjacent Sides— two sides of a polygon that share the same ___________ (side-by-side). Opposite Sides— sides that are directly ________________ from one another. HOW ARE THEY RELATED? Vocabulary: Quadrilateral– closed figure with ______ sides and ________ angles. Trapezoid– has one pair of ____________ sides. Parallelogram– opposite sides ___________ and opposite sides ____________. Rectangle– parallelogram with 4 __________ angles. Square– parallelogram with 4 right angles and 4 ______________ sides. Rhombus– parallelogram with 4 congruent ___________ . There is a total of ___________ degrees in every quadrilateral! Examples of “Congruency” and “Parallel” Notation: Matching tick marks mean those sides are _________________. Matching arrow marks mean those sides are _________________. True or False (correct “False” answers in order to make them “True”): 1) _____ Every square is also a rhombus. 2) _____ Every rhombus is also a square. 3) _____ Every rectangle is a parallelogram. 4) _____ Parallelograms have opposite sides that are perpendicular. 5) _____ A square is a special type of trapezoid. 6) _____ Not all rectangles are squares. 7) _____ It is impossible for a square to also be a rectangle. 8) _____ A trapezoid is a parallelogram. 9) _____ Every trapezoid is also a quadrilateral. 10) _____ A quadrilateral can have more than four angles. 11) _____ The trapezoid is the only quadrilateral that is NOT a parallelogram. 12) _____ SpongeBob has square pants. NAME:___________________________________ Math-7 Practice DATE: ______/_______/_______