Download Complementary Angles: two angles are complementary when they

"corner"
Complementary Angles:
two angles are complementary when they
add up to 90 degrees (a right angle)
"straight"
Supplementary Angles:
two angles are supplementary when they
add up to 180 degrees (a straight angle)
Adjacent Angles:
two angles are adjacent if they have a
common side and a common vertex
(corner point) and they don't overlap; in
other words, they are next to each other
Vertical Angles:
angles that are opposite each other when
two lines cross are called vertical
angles; they are equal in measure
Naming Angles:
we name angles using 3 points--one
point on one side of the angle, the vertex
(corner) point, and a point on the other
side of the angle, in that order! the
vertex is always in the middle!
Angles formed by Parallel Lines
and a Transversal:
Corresponding Angles: angles that occupy the same position at
their intersections; they are equal in measure
Alternate Interior Angles: they lie inside the parallel lines on
opposite sides of the transversal; they are equal in measure
Alternate Exterior Angles: they lie outside the parallel lines on
opposite sides of the transversal; they are equal in measure