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Chapter 8 Vocabulary

Anles, lines, triangles

Vocabulary	Answers
Point	a bold dot
Line	keeps going without in two opposite directions.
Angle	formed by two rays with the same end point
Ray	has on end with a point and the other keeps going in one direction.
Plane	a flat surface that extends without end in all directions.
Vertex	The end point of two lines
Straight angle	measures 180°
Right angle	measures 90° and has a little box
Supplementary	if the sum of theirs measures 180°
Complementary	The sum of theirs measures 90°
Vertical angle	there pairs are called vertical angles, and they always have the same measure. OPPOSITE PAIRS
Paralled Lines	two lines that do not intersect. SAME PLANE
Perpendicular lines	two lines that intersect at a right angle.
Corresponding angles	angles that occupliy corresponging positions when a line intersects with two other lines
alternate interior angles	insider angles
alternate exterior angle	outside angles
Quadrilateral	a closed figure with four sides that are line segments
Trapezoid	quadrilateral with exactly one pair of parallel sides
Parallelogram	quadrilateral with both pairs of opposite sides parallel.
Rhombus	parallelogram with 4 sides of equal length.
Rectangle	parallelogram with 4 right angles
Square	parallelogram with 4 sides of equal lenth and 4 right angles.
Acute angle	measure is less then 90°
Right angle	measure is exactly 90°
obtuse angle	measure is greater then 90° and less then 180°
acute triangle	has 3 acute angles
Right Triangle	has one right angle
Obtuse Triangle	has on obtuse angle
Equilateral Triangle	has 3 sides of equal lenth
isosceles Triangle	has 2 of the same side lengths
Scale Triangle	has NO sides of the same length.

Created by: bttnsX3rX3awsme on 2008-03-31