Definitions

Question 1

Geometry

Answer 1

branch of mathematics that deals with points, lines, planes

Question 2

Point

Answer 2

Has no size, length, width or height. Represented by a dot

Question 3

Line

Answer 3

set of points which has infinite length but no width or height. A line is named by a lower case letter

Question 4

Plane

Answer 4

set of points that has infinite length and width but no height. We name a plane with a capital letter

Question 5

Collinear points

Answer 5

points that lie on the same line.

Question 6

Noncollinear points –

Answer 6

points that do not lie on the same line.

Question 7

Coplanar points

Answer 7

points that lie on the same plane.

Question 8

Noncoplanar points

Answer 8

points that do not lie on the same plane.

Question 9

Segment

Answer 9

part of a line that consists of two points called endpoints

Question 10

Ray

Answer 10

is the part of a line that contains an endpoint and all points extending in the other direction.

Question 11

Congruent segments

Answer 11

segments that have the same length.

Question 12

Bisector of a segment

Answer 12

line, ray segment, or plane that divides a segment into two congruent segments.

Question 13

Midpoint of a segment

Answer 13

a point that divides the segment into two congruent segments.

Question 14

Acute angle

Answer 14

Angle below 90 degrees

Question 15

Right angle

Answer 15

Angle who measures at 90 degrees

Question 16

Obtuse angle

Answer 16

angle whose measure is greater than 90 degrees but less than 180 degrees.

Question 17

Straight angle

Answer 17

Angle that measures at 180

Question 18

Congruent angles –

Answer 18

Angles that are congruent on each side

Question 19

Angle bisector

Answer 19

A ray tht divides an angle into 2 congruency adjacent angles

Question 20

Triangle

Answer 20

the figure formed by three segments joining three noncollinear points.

Question 21

Acute triangle

Answer 21

triangle that has all acute angles.

Question 22

Right triangle

Answer 22

Triangle with right angle

Question 23

Obtuse triangle

Answer 23

Triangle with an obtuse angle

Question 24

Equiangular triangle

Answer 24

triangle with all angles congruent.

Question 25

Scalene triangle

Answer 25

triangle with no sides congruent.

Question 26

Isosceles triangle

Answer 26

triangle with at least two sides congruent.

Question 27

Equilateral triangle

Answer 27

triangle with all sides congruent.

Question 28

Adjacent angles

Answer 28

two coplanar angles with a common vertex and a common side between them

Question 29

Vertical angles

Answer 29

the non-adjacent angles formed by two intersecting lines.

Question 30

Complementary angles

Answer 30

two angles whose sum is 90 degrees.

Question 31

Complementary angles

Answer 31

two angles whose sum is 90 degrees.

Question 32

Supplementary angles

Answer 32

two angles whose sum is 180 degrees.

Question 33

Perpendicular lines –

Answer 33

two lines that intersect to form right angles.

Question 34

Parallel lines –

Answer 34

two lines are parallel if they are coplanar and do not intersect.

Question 35

Skew lines –

Answer 35

are noncoplanar lines they will not intersect.

Question 36

Polygon

Answer 36

– union of 3 or more coplanar segments that meet only at endpoints

Question 37

Regular polygon –

Answer 37

polygon which is equilateral and equiangular.

Question 38

Congruent triangles –

Answer 38

two triangles are congruent if corresponding sides are congruent and corresponding angles are congruent.

Question 39

Median of a triangle

Answer 39

segment from the vertex of a triangle to the midpoint of the opposite side.

Question 40

Altitude of a triangle

Answer 40

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

Question 41

Parallelogram –

Answer 41

quadrilateral with both pairs of opposite sides parallel