Adjacent Angles- Two angles in a
plane that share a common vertex and common side, but do not
overlap.
plane that share a common vertex and common side, but do not
overlap.
Vertical Angles- angles that are
opposite at the intersection of two lines
opposite at the intersection of two lines
Vertex- a corner point of a
geometric figure. For a polygon, vertices are where adjacent sides meet. For an
angle, the vertex is where the two rays making up the angle meet.
{Plural: Vertices}
geometric figure. For a polygon, vertices are where adjacent sides meet. For an
angle, the vertex is where the two rays making up the angle meet.
{Plural: Vertices}
Congruent Angles- angles that have the same measurement
Supplementary Angles- angles
that add up to 180 degrees
that add up to 180 degrees
Complementary angles- angles that
add up to 90 degrees
add up to 90 degrees
Transversal- a line that cuts
across a set of lines or the sides of a plane figure. Transversals often
(but not always) cut across parallel lines.
across a set of lines or the sides of a plane figure. Transversals often
(but not always) cut across parallel lines.
Corresponding Angles- a pair
of nonadjacent angles that lie on the same side of a transversal of two lines
AND in corresponding positions
of nonadjacent angles that lie on the same side of a transversal of two lines
AND in corresponding positions
Alternate Interior Angles- two
interior angles which lie on different parallel lines and on opposite sides of a
transversal
interior angles which lie on different parallel lines and on opposite sides of a
transversal