Geometry Semester 1 Exam

Front 1

collinear

Back 1

points that lie on the same line

Front 2

obtuse triangle

Back 2

a triangle in which one of the angles is obtuse

Front 3

reflexive property

Back 3

any line or angle in congruent to itself

Front 4

complementary angles

Back 4

2 angles whose sum is 90

Front 5

equiangular triangle

Back 5

a triangle in which all angle's are congruent

Front 6

CPCTC

Back 6

corresponding parts of congruent triangles are congruent

Front 7

median

Back 7

a line segment drawn from any vertex of the triangle to the midpoint of the opposite side

Front 8

noncoplanar

Back 8

points, lines, or segments that do not lie on the same plane

Front 9

acute triangle

Back 9

a triangle in which all angles are acute

Front 10

coplanar

Back 10

points,lines, or segments that lie on the same plane

Front 11

trisect

Back 11

2 points that divide a segment into 3 congruent segments

Front 12

altitude

Back 12

a perpendicular line segment from a vertex of a triangle to the line containing the opposite side

Front 13

congruent triangles

Back 13

all pairs of corresponding parts are congruent

Front 14

leg

Back 14

the sides that are formed from the right angle

Front 15

line

Back 15

straight, made up of at least 2 points and extends infinitely far in both directions

Front 16

hypotenuse

Back 16

the side opposite the right angle

Front 17

equilateral triangle

Back 17

a triangle in which all sides are congruent

Front 18

supplementary angles

Back 18

2 angles whose sum is 180

Front 19

congruent

Back 19

segments or angles that have the same length or measure

Front 20

isosceles triangle

Back 20

a triangle in which at least two sides are congruent

Front 21

right triangle

Back 21

a triangle in which one of the angles is a right angle

Front 22

angle

Back 22

made up of 2 rays with a common endpoint

Front 23

ray

Back 23

made up of points and are straight and begin at an endpoint and extends infinitely far in only one direction

Front 24

perpendicular

Back 24

lines, rays or segments that intersect at right angles

Front 25

obtuse angle

Back 25

an angle whose measure is greater than 90 and less than 180

Front 26

slope

Back 26

the slope (m) of a nonvertical line, segment, or ray containing (x ,y ) and (x ,y ) is defined by the formula

Front 27

right angle

Back 27

an angle whose measure is 90

Front 28

noncollinear

Back 28

points that do not lie on the same line

Front 29

bisect

Back 29

a ray that divides an angle into two congruent angles

Front 30

acute angle

Back 30

angle whose measure is greater than 0 and less than 90

Front 31

scalene triangle

Back 31

a triangle in which no two sides are congruent

Front 32

straight angle

Back 32

an angle whose measure is 180