Monday, Jan. 25th: Unit 9 Vocabulary Words

Question 1

acute angle

Answer 1

an angle measuring less than 90º

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

he 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 180

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