Unit one

Question 1

A portion of a line consisting of an initial point and all the points lying to one side of that point is called a ________.

Answer 1

Ray

Question 2

Two lines intersect in a _________________.

Answer 2

intersection

Question 3

A/an ________________________ is a mathematical statement that is accepted without proof

Answer 3

Undefined term

Question 4

If a ray divides an angle into two congruent angles, then the ray is called a/an _________________.

Answer 4

segment bisector

Question 5

Two angles that have the same measure are called ____________________.

Answer 5

congruent angles

Question 6

An angle whose measure is greater than 90 degrees and less than 180 degrees is called _____________.

Answer 6

obtuse angle

Question 7

Two angles whose measures total 90 degrees are ________________________________.

Answer 7

complementary

Question 8

When two lines intersect, they form two pairs of nonadjacent, opposite angles. These angles are called ___________________________________.

Answer 8

Vertical angles

Question 9

Two angles whose measures total 180 degrees are _________________________________.

Answer 9

supplementary

Question 9

If two angles share a vertex and a side but have no interior points in common, the angles are said to be ________________________.

Answer 9

adjacent angles

Question 10

m∠CBD+m∠DBA=m∠CBA is the mathematical representation of the ________________________________ postulate.

Answer 10

Angle addition postulate

Question 11

Adjacent angles are . . .

Answer 11

two angles that share a common vertex (a point where two lines meet) and a common side (a line segment that both angles touch), but they do not overlap.

Question 12

Linear pair

Answer 12

a pair of adjacent, supplementary angles

Question 13

Regular polygon

Answer 13

Has equal sides and equal interior angles

Question 14

Irregular polygon

Answer 14

not all sides or interior angles are equal

Question 15

Equilateral polygon

Answer 15

all sides are equal

Question 16

Equiangular polygon

Answer 16

all interior angles are equal

Question 17

triangle

Answer 17

polygon with three sides

Question 18

quadrilateral

Answer 18

polygon with 4 sides

Question 19

pentagon

Answer 19

polygon with 5 sides

Question 20

hexagon

Answer 20

6 sides

Question 21

convex polygon

Answer 21

all interior angles are less than 180

Question 22

concave polygon

Answer 22

at least one interior angle is more than 180

Question 23

what is the distance formula?

Answer 23

d={square root} (x2-x1) {squared}+(y2-y1){squared}