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Point |
Book: An exact location in a space
My: A dot or mark that shows an exact location (line segment) |
Plane |
Book: A flat surface that extends forever
My: An even surface that goes on forever |
Line |
Book: A straight path that extends without end in opposite directions My: A straight line that goes on forever in both directions |
Ray |
Book: A part of the line that starts at one endpoint and extends for ever.
My: One side of a line that goes on forever and the other that ends at a point |
Line Segment |
Book: A part of a line between two end points My: A line that has two end points |
Congruent |
Book: Having the same size and shape My: Two objects that have the same size and shape |
Angle |
Book: A figure formed by two rays with a common end point called the vertex My: A figure that has two rays and a vertex |
Vertex ( of an angle) |
Book: The common end point of the sides of an angle My: The point where two lines in an angle meet |
Acute Angle |
Book: An angle that measures less than 90˚ My: An angle that is less than 90˚ |
Right Angle |
Book: An angle that measures 90˚ My: An angle that is 90˚ |
Obtuse Angle |
Book: An angle whose measure is greater than 90˚ but is less than 180˚ My: An angle less than 180˚ but greater than 90˚ |
Straight Angle |
Book: An angle that measures 180˚ My: An angle that is 180˚ |
Adjacent Angles |
Book: Angles in the same plane that are side by side and have a common vertex and a common side My: Angles that have the same vertex and side |
Vertical Angles |
Book: A pair of angles that are formed by two intersecting lines and are not adjacent My: Two angles that are formed by intersecting lines and are not adjacent |
Complementary Angles |
Book: two angles whose measures add to 90˚ My: two angles that add up to 90˚d |
Supplementary Angles |
Book: two angles whose meaures add to 180˚ My: two angles that add up to 180˚ |
Polygon |
Book: a closed plane figure formed by 3 or more line segments(sides). Each side meets exactaly two other sides, one on each end, in a common endpoint(vertex). My: a closed plane that has to meet 2 other sies and have a common endpoint on each end |
Vertex |
Book: the intersection of two sides of the polygon My: the intersection of two sides of a polygon |
Triangle |
Book: a three-sided polygon My: a polygon with 3 sides |
Quadrilateral |
Book: a four sided polygon My: a polygon with 4 sides |
Pentagon |
Book: a five sided polygon My: a polygon with 5 sides |
Hexagon |
Book: a six sided polygon My: a polygon with 6 sides |
Heptagon |
Book: a seven sided polygon My: a polygon with seven sides |
Octagon |
Book: a eight sided polygon My: a polygon with eight sides
|
Nonagon |
Book: a nine sided polygon My: a polygon with nine sides |
Decagon |
Book: a ten sided polygon My: a polygon with ten sides |
Scalene Triangle |
Book: a triangle with no congruent sides
My: a triangle that does not have any equal sides |
Isosceles Triangle |
Book: a triangle with at least two congruent sides
My: a triangle that only has two equal sides |
Acute Triangle |
Book: a triangle with all angles measuring less than 90˚
My: a triangle with all acute angles |
Obtuse Triangle |
Book: a triangle containing one obutse angle
My: a triangle with only one obtuse angle |
Right Triangle |
Book: a triangle containing a right angle
My: a triangle with exactly one right angle |
Parallelogram |
Book: a quadrilateral with two pairs of parallel sides
My: a quadrilateral that has opposite sides parallel |
Rectangle |
Book: a parallelogram with four right angles
My: a parallelogram that has four 90˚ angles |
Rhombus |
Book: a parallelogram with all sides congruent
My: a parallelogram that has all sides congruent |
Square |
Book: a rectangle with four congruent sides
My: a parallelogram with four right angles and all sides congruent |
Trapezoid |
Book: a quadrilateral with exactaly one pair of parallel sides
My: a quadrilateral with only one pair of parallel sides |
Side-side-side Rule |
Book: a rule stating that if tree sides of one triangle are congruent to the three sides of another triangle, then the triangles are congruent
My: a rule that says if all sides are congruent (3 from one and 3 from another), in a triangle, they are congruent |
Vertex (of a polygon) |
Book: the intersection of two sides of the polygon
My: the intersection of two sides in a polygon |