Math-7 NOTES What do you think of when you hear the word “Geometry?” DATE: ______/_______/_______ What: Quadrilaterals Why: To introduce basic geometry vocabulary and focus on quadrilateral relationships. NAME: What do you think of when you hear the word “Geometry?”

Essential Vocabulary: Congruent– objects that are _________ in 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.

There is a total of ___________ degrees in every quadrilateral! 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: True or False (correct “False” answers in order to make them “True”): _____ Every square is also a rhombus. _____ Every rhombus is also a square. _____ Every rectangle is a parallelogram. _____ Parallelograms have opposite sides that are perpendicular. _____ A square is a special type of trapezoid. _____ Not all rectangles are squares. _____ It is impossible for a square to also be a rectangle. _____ A trapezoid is a parallelogram. _____ Every trapezoid is also a quadrilateral. _____ A quadrilateral can have more than four angles. _____ The trapezoid is the only quadrilateral that is NOT a parallelogram. 12) _____ SpongeBob has square pants.

Math-7 Practice “QUADRILATERALS” DATE: ______/_______/_______ NAME:___________________________________