Top of book—front of yellow page My Geometry Book

Angle Relationship Point: Line: Line Segment: -An exact position in ____ Line: -Goes on forever in ____ directions; must have ______ on both ends Line Segment: -A part of a ___ between __ endpoints Underside of top page—yellow page Find the missing angle in the quadrilaterals below Angle Relationship A=90° B=90° C= D=90° A=110° D=110° B= C=70° A=65° C=115° D=115° The sum of the angles in any quadrilateral is ______ degrees

Basic Geometric Figures ANGLE RELATIONSHIPS Find the missing angle in the triangles below. A = 60° B = 60° C = A = B = 90° C = 45° A = 120° B = 30° C = The sum of the angles in any triangle is __________ degrees. Front of orange page Ray: -part of a line with __ endpoint that goes on forever in __ ___________ Angle: -2 rays that ______ an endpoint Vertex: -the point at which __ line segments, lines, or rays ____ to form an angle Polygon: -a ______ figure formed from line segments that meet only at their ________ Regular Polygon: -a _______ with all sides the same length & all angles the _____ measure Plane: -a flat _______ that extends infinitely in all __________ Basic Geometric Figures

LINES Parallel Lines: -Lines that will _____ intersect Perpendicular Lines: -Lines that _________ at right angles Intersecting Lines: -Lines that “_____” or “____”; think of a street intersection Back of orange page Triangles can also be classified according to the length of their sides. Equilateral Triangle -All 3 sides are __________ -All 3 angles are __________ Isosceles Triangle -____________________ ____________________ -2 angles, called the base, are congruent Scalene Triangle -No _____ are congruent Triangles

Lines and Angles TRIANGLES Triangles can be classified according to their angles Acute Triangle -All 3 ______ are acute (less than 90°) Obtuse Triangle -Exactly 1 _____ is an obtuse angle Right Triangle -Exactly ___________ __________________ -the acute angles are complementary Front of green page Acute Angles: -measures _____ ________ 90°; think “a little cute angle” Obtuse Angles: -measures _____ ______ 90° but ______ _______ 180° Right Angles: -measures ___°; think of a “perfect corner” Straight Angles: -measures ___°; think of a straight line Lines and Angles

Quadrilaterals QUADRILATERALS A Quadrilateral is a 4-sided polygon. The sum of the 4 angles of any quadrilateral is 360° Rhombus -Consecutive ______ are supplementary -Both pairs of opposite _____ are ________ -All sides are __________ -Both pairs of opposite _____ are congruent Square -Both pairs of opposite _____ are parallel -All pairs of adjacent _____ are perpendicular -All angles are _____ _____ Back of green page Parallelogram -Both pairs of opposite _____ are parallel -Both pairs of opposite sides are __________ -Both pairs of opposite ______ are congruent -Consecutive ______ are supplementary Rectangle -All pairs of adjacent sides are ____________ -All angles are _____ angles Trapezoid -Exactly ____ pair of opposite sides is parallel -Exactly two pairs of consecutive ______ are supplementary Quadrilaterals