Geometry 1109 Self Test

Postulate 7

All straight angles are congruent

Postulate 5

An angle has only one bisector

Postulate 11

Angles that are supplements of the same angle, or congruent angles, are congruent

Postulate 3

A line segment can be bisected at one point

Three undefined terms in geometry are __________, ____________, and ____________

point, line, plane

The two instruments used in construction are the ____________ and ____________

straightedge, compass

vertex

the common endpoint of the two rays that form an angle

What are the objectives of geometry?

to discover facts and to develop the ability to prove facts

complementary angles

two angles whose measures have a sum of 90

line segment

two endpoints and all points between them

vertical angles

two pairs of nonadjacent angles formed by two intersecting lines

congruent segments

segments with the same length

Postulate 1

Only one straight line can be drawn through two points; two points determine a straight line

bisector of a line segment

a line, ray, or line segment that intersects the segment at its midpoint, dividing the line segment into two congruent points