Question 1

What is a point?

Accepted Answer

an exact location; labeled with a capital letter

Question 2

What is a line?

Accepted Answer

a straight geometric object that goes on forever in both directions with no endpoints

Question 3

What is a line segment?

Accepted Answer

a part of a line that has two endpoints

Question 4

What is a ray?

Accepted Answer

part of a line that starts at an endpoint and goes on forever in one direction

Question 5

What are parallel lines?

Accepted Answer

lines that stay the same distance from each other forever and never intersect

Question 6

What are perpendicular lines?

Accepted Answer

lines that intersect at a point and form 90° angles

Question 7

What are intersecting lines?

Accepted Answer

lines that cross at a point

Question 8

What are vertices?

Accepted Answer

a point where two or more lines come together; also called the corner on a polygon

Question 9

What is an acute angle?

Accepted Answer

an angle that is less than 90°

Question 10

What is an obtuse angle?

Accepted Answer

an angle that is more than 90° and less than 180°

Question 11

What is a right angle?

Accepted Answer

an angle that measures exactly 90°

Question 12

What is a straight line?

Accepted Answer

an angle that measures exactly 180°

Question 13

What are complementary angles?

Accepted Answer

two angles that add up to 90°

Question 14

What are supplementary angles?

Accepted Answer

two angles that add up to 180°

Question 15

What are opposite angles?

Accepted Answer

angles that are across from each other; they do not share a side or vertex; they are congruent (equal)

Question 16

What are adjacent angles?

Accepted Answer

two angles that are formed with a common side

Question 17

What is an equilateral triangle?

Accepted Answer

a triangle with three equal sides (the angles will also all be congruent/equal)

Question 18

What is an isosceles triangles?

Accepted Answer

a triangle with two equal sides

Question 19

What is a scalene triangle?

Accepted Answer

a triangle with no congruent/equal sides

Question 20

What is an acute triangle?

Accepted Answer

a triangle with all acute angles

Question 21

What is a right triangle?

Accepted Answer

a triangle with one right angle

Question 22

What is an obtuse triangle?

Accepted Answer

a triangle with one obtuse angle

Question 23

What is a quadrilateral?

Accepted Answer

a four sided polygon; the sum of the angles equal 360°

Question 24

What is a parallelogram?

Accepted Answer

contains two sets of parallel sides; opposite sides are congruent (equal in length)

Question 25

What is a rhombus?

Accepted Answer

contains two sets of parallel sides; all side are congruent

Question 26

What is a rectangle?

Accepted Answer

contains two sets of parallel sides; opposite sides are congruent; all four angles measure 90°

Question 27

What is a square?

Accepted Answer

contains two sets of parallel sides; all sides are congruent; all four angles measure 90°

Question 28

What is a trapezoid?

Accepted Answer

a quadrilateral that contains only one set of parallel sides

Question 29

What are interior angles?

Accepted Answer

the angles inside of a figure

Question 30

What are exterior angle?

Accepted Answer

the angles on the outside of a figure when the sides are extended

Question 31

What is an octagon?

Accepted Answer

an 8-sided polygon

Question 32

What is a pentagon?

Accepted Answer

a 5-sided polygon

Question 33

What is a hexagon?

Accepted Answer

a 6-sided polygon

Question 34

What does is congruent mean?

Accepted Answer

equal or same

Question 35

What is a diagonal?

Accepted Answer

a line that cuts across a figure connecting two vertices that are not adjacent

Question 36

What is line symmetry?

Accepted Answer

a figure has this when a line can divide it into two congruent parts

Question 37

What is rotational symmetry?

Accepted Answer

a figure has this when it can be turned around a point and look exactly the same as its original image after rotating

Question 38

What is reflection?

Accepted Answer

a type of transformation that moves a figure by flipping it across a line

Question 39

What is a translation?

Accepted Answer

a transformation that moves a figure in a straight line without turning or flipping

Question 40

What is a rotation?

Accepted Answer

a transformation that moves a figure by turning it on a point

Question 41

What are vertical angles?

Accepted Answer

the two angles that are opposite of each other when two lines cross; these angles are always congruent

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