Pre-Algebra - Test 3 - Study Outline
Name____________________
Angle Relationships
I. Vocabulary
a) complementary angles (sum is 90 degrees)
b) supplementary angles (sum is 180 degrees)
c) adjacent angles (two angles with a common endpoint and common ray)
d) parallel lines (2 lines in a plane that do NOT intersect)
e) perpendicular lines (2 lines that intersect and form right angles)
f) vertical angles (2 angles formed by intersecting lines that are congruent)
g) right angle (measures exactly 90 degrees0
h) acute angle (measures greater than 0 degrees and less than 90 degrees)
i) obtuse angle (measures greater than 90 degrees and less than 180 degrees)
j) straight angle (measures exactly 180 degrees)
k) vertex (the point where two rays meet in an angle)
II. Use Equations to find missing angle measures
Parallel lines, Triangles, and Polygons
III. Parallel lines (angle relationships)
a) alternate interior angles
b) alternate exterior angles
c) corresponding angles
d) recognize when angles are congruent or supplementary
IV. Triangles
a) classify by sides
i) scalene (no congruent sides)
ii) isosceles (2 congruent sides) and 2 congruent angles
a) identify vertex angle, base angles, the base, and the legs
iii) equilateral (all 3 sides congruent)
b) classify by angles
i) acute (all angles are acute)
ii) right (1 right angle, 2 acute angles)
iii) obtuse (1 obtuse angle, 2 acute angles)
V. Triangle Inequality
a) largest side opposite largest angle, smallest side opposite smallest angle
b) the sum of the two smaller sides must be greater than the longest side
VI. Polygons (simple, closed figure, made up of line segments)
a) names of polygons (triangle, quadrilateral, pentagon, hexagon, septagon, octagon, etc.)
b) regular polygons (all equal sides and angles)
c) find sum of interior angles
d) find measure of one interior angle in regular polygon
e) find measure of exterior angle of polygon
VII. Similar Figures (word problems)