unit 9

Question 1

-acute angle:

Answer 1

an angle measuring less than 90

Question 2

-angle:

Answer 2

a figure formed by 2 rays that share a common endpoint

Question 3

-angle congruency marks:

Answer 3

angle marks indicating angles of the same

measure

Question 4

-area:

Answer 4

the number of square units needed to cover a surface

Question 5

-bases of a right rectangular prism:

Answer 5

any congruent, opposite, and parallel

faces shaped like rectangles; exactly 3 possible sets

Question 6

-congruent:

Answer 6

having the same size and shape

Question 7

-edge:

Answer 7

the line segment where two faces of a solid figure meet

Question 8

-equation:

Answer 8

a number sentence that uses the equal sign to show two

expressions are equivalent

Question 9

-equiangular:

Answer 9

all angles in a polygon are congruent in measure

Question 10

-equilateral:

Answer 10

all side lengths of a polygon are congruent in measure

Question 11

-face:

Answer 11

a flat surface of a three-dimensional solid figure

Question 12

-height of a rectangular prism:

Answer 12

the length of a side that is perpendicular to

both sides

Question 13

-obtuse angle:

Answer 13

an angle that measuring more than 90o but less than 180o

Question 14

-polygon:

Answer 14

a closed figure made of line segments

Question 15

-positive rational numbers:

Answer 15

a number that can be written as !
“
in which
number a and b are counting (natural) numbers but b is not equal to 0

Question 16

-prism:

Answer 16

a three-dimensional figure containing two congruent and parallel faces
that are polygons

Question 17

-properties of triangles:

Answer 17

relationships of attributes within a triangle
(e.g., an equilateral triangle has all sides and angles congruent, the sum of the
lengths of two sides of a triangle is always greater than the length of the third
side, the sum of the angles of a triangle is always 180o; etc.)

Question 18

-right angle:

Answer 18

an angle with a measure of 90o

Question 19

-side congruency marks:

Answer 19

side marks indicating side lengths of the measure

Question 20

-three-dimensional figure:

Answer 20

a solid figure that has length, width and height

Question 21

-triangle:

Answer 21

a polygon with 3 sides and 3 angles

Question 22

-triangle inequality theorm:

Answer 22

the sum of the lengths of any two sides of a

triangle is greater than the length of the third side

Question 23

-two-dimensional figure:

Answer 23

a plane figure that has length and width

Question 24

-unit rate:

Answer 24

a comparison of two measures with one term having a value of 1;
may also be called unit price or unit cost

Question 25

-vertex (vertices):

Answer 25

the point where two rays meet, where two sides of a
polygon meet, or where the edges of a three-dimensional figure meet; the top
point of a cone or pyramid

Question 26

-volume:

Answer 26

the number of cubic units needed to fill the space occupied by a
solid