vocabulary 1

Question 1

segment bisector

Answer 1

a point, segment, line, or plane that divides a line segment into two equal parts

Question 2

supplementary

Answer 2

two angles are supplementary when they add up to 180 degrees

Question 3

complementary

Answer 3

when two angles add up to 90 degrees

Question 4

angle (obtuse, right, straight, and acute)

Answer 4

obtuse- more than 90 degrees, less than 180 degrees
right- 90 degrees
straight- 180 degrees
acute- less than 90 degrees

Question 5

vertex

Answer 5

corners/ intersections of geometric shapes

Question 6

sides

Answer 6

a surface forming the outside of a thing, or one of the lines bounding a geometric figure

Question 7

degree

Answer 7

a unit of measurement of angles, 1/360 in a circle

Question 8

angle bisector

Answer 8

a line/Ray that divides an angle into 2 congruent angles (interior and exterior)

Question 9

linear pair

Answer 9

a linear pair is a pair of adjacent, supplementary angles. adjacent meaning next to each other and supplementary meaning they add up to 180 degrees

Question 10

opposite Rays

Answer 10

a “Ray” in geometry is half of a line. a ray has one endpoint and extends indefinitely in one direction

Question 11

adjacent angles

Answer 11

two angles that have a common vertex and a common side

Question 12

point

Answer 12

a precise location or place on a plane. usually represented by a dot. (an element of some set called a space)

Question 13

line

Answer 13

a straight path that is endless in both directions

Question 14

plane

Answer 14

a flat, 2 dimensional surface with no thickness that is infinite in all directions

Question 15

line segment

Answer 15

part of a line that is bounded by two distinct endpoints.

Question 16

collinear

Answer 16

points that lie on the same straight line

Question 17

endpoint

Answer 17

a point/value that marks the end of a ray or one of the ends to a line segment

Question 18

Ray

Answer 18

a line with a single endpoint that extends infinitely in one direction

Question 19

Coplanar

Answer 19

3 or more points which all lie in the same plane

Question 20

parallel

Answer 20

side by side and having the same distance between them

Question 21

postulate

Answer 21

a true statement which doesn’t require to be proved

Question 22

midpoint

Answer 22

the point on a line that divides the segment into two congruent segments