Angles (Geometry) Flashcards
Measures below 90°
acute
equal to 90°
right angle
larger than a degree, but less than 180°
obtuse
Equal to 180°
straight
angles that add up to 90°
complementary angles
[a+b= 90°]
Angles that add up to 180°
Supplementary Angles
[a+b= 180°]
Angles that are equal
vertical angles
a = b
c = d
Angles with a common side and vertex
adjacent angles
A straight path of points that has no beginning or end
line
Contains one and the point, and extends forever in one direction
ray
A portion of a line that has two endpoints
segment
Lines that come together at a point
intersecting lines
two lines which intersect at right angles (90°)
perpendicular lines
two or more lines that are the same distance apart, and never meet
parallel lines
Lines that crosses two or more lines
transversal line
two angles on different sides form INSIDE two parallel lines
Alternate interior angles
two angles on different sides formed OUTSIDE two parallel lines
Alternate exterior angles
