Domain Three- Geometry And Measurement

Question 1

Plane geometry

Answer 1

Study of shapes and figures in two dimensions

Question 2

Solid geometry

Answer 2

Study of shapes and figures in three dimensions

Question 3

Point

Answer 3

Most fundamental idea in geometry; represented by a dot and named with a capital letter

Question 4

Straight line

Answer 4

Shortest path connecting two points; continues forever in opposite directions; infinite number of points; named by any two points on the line

Question 5

Line segment

Answer 5

A piece of a line; two endpoints

Question 6

Ray

Answer 6

One endpoint; continues forever in one direction; half-line

Question 7

Angle

Answer 7

Formed by two rays that start from the same point called the vertex

Question 8

Adjacent Angles

Answer 8

Any angles that share a common side and a common vertex

Question 9

Right angle

Answer 9

90 degree angle

Question 10

Acute angle

Answer 10

Less than 90 degrees

Question 11

Obtuse angle

Answer 11

Larger than 90 degrees but less than 180 degrees

Question 12

Straight angle

Answer 12

Measure of 180 degrees (line)

Question 13

Complementary Angles

Answer 13

Two angles who add up to 90 degrees

Question 14

Supplementary angles

Answer 14

Two adjacent angles that form a straight line (sum of 180 degrees)

Question 15

Angle Bisector

Answer 15

A ray from the vertex of an angle that divides the angle into two equal pieces

Question 16

Vertical angles

Answer 16

Angles that are opposite of each other

**always equal

Question 17

Adjacent angles

Answer 17

Share a common side and vertex

Question 18

Intersecting lines

Answer 18

Two or more lines that cross each other at a point

Question 19

Perpendicular lines

Answer 19

Two lines that meet to form right angles (90 degrees)

Question 20

Parallel lines

Answer 20

Two or more lines that remain the same distance apart at all times

**never meet

Question 21

Transversal

Answer 21

A third line that cuts two parallel lines

Question 22

Polygons

Answer 22

A closed figure formed with line segments which are called the sides

Question 23

Triangle

Answer 23

Three-sided polygon; three angles in its interior; sum of angles is always 180 degrees

Question 24

Equilateral Triangle

Answer 24

All three angles are the same, all three sides are the same (Each is 60 degrees)

Question 25

Isosceles Triangle

Answer 25

At least two sides are equal in length; angles opposite the equal sides will have equal measure

Question 26

Scalene Triangle

Answer 26

All three sides are different lengths; all angles have different measures; largest angle will be opposite the largest side; smallest opposite the shortest

Question 27

Equiangular triangle

Answer 27

All of its angles are equal measure; all 60 degrees; equilateral

Question 28

Acute Triangle

Answer 28

Each of its angles with measures less than 90 degrees

Question 29

Obtuse triangle

Answer 29

Has one of its angles with a measure greater than 90 degrees

Question 30

Right triangle

Answer 30

One of its angles with a measure equal to 90 degrees

Question 31

Altitude (height)

Answer 31

Segment that goes from a vertex of the triangle and makes a 90 degree angle with the opposite side known as the base

Question 32

Median

Answer 32

A segment that goes from one vertex of a triangle to the midpoint of the opposite side

Question 33

Angle Bisector

Answer 33

Segment that goes from one vertex of a triangle and divides the angle at the vertex into two smaller but equal angles

Question 34

45-45-90 Right Triangle

Answer 34

Isosceles right triangle; if each of the sides that form the right angle has a measure of 1, then using Pythagorean theorem, find the hypotenuse

Question 35

30-60-90 Right Triangle

Answer 35

Special right triangle; equilateral triangle cut in half