Geometry Ch. 1 Terms

23 terms

metric

centimeter is an example of length

line

lowercase script letter

collinear

Points on the same line

line segment

it has two endpoints and can be measured

supplementary

Two angles whose measures have a sum of 180°

customary

inch is an example of length

ray

one endpoint and extends indefinitely in one direction

obtuse

angle that measures between 90° and 180°

coplanar

Points on the same plane

plane

represented by a capital script letter

vertical

Two nonadjacent angles formed by two intersecting lines

vertex

common endpoint of an angle

perpendicular

lines that form right angles

complementary

Two angles whose measures have a sum of 90°

acute

angle that measures between 0° and 90°

linear pair

two adjacent angles whose opposite sides form a line

right

angle that measures 90°

bisect

cuts into two equal pieces

perpendicular

coplanar lines whose two slopes product is -1

point

represented by a capital letter

parallel

coplanar lines that do not intersect

y=mx + b

point-slope form

y -y1 = m(x - x1)