Two dimensional shapes and their attributes

1.

an exact position often marked as a dot

point

2.

a straight path of points that is endless in two directions

line

3.

a part of a line with two endpoints

line segment

4.

lines that cross at one point

intersecting lines

5.

lines that never cross

parallel lines

6.

a part of a line that has one endpoint and continues endlessly in one direction

ray

7.

a figure formed by two rays that have the same endpoint.

angle

8.

1. the point where two rays met to form an angle.

2. the points where the sides of a polygon meet

3. the points where 3 or more edges meet in a

solid figure that does not roll.

4. the pointed part of a cone

vertex plural: vertices

9.

an angle that forms one square corner or 90 degree angle

right angle

10.

an angle that's open end measures less than a right angle

acute angle

11.

an angle that's open measures more than a right angle

obtuse angle

12.

two lines, line segments or rays that form right angles

perpendicular

13.

a closed figure made up of line segments

polygon

14.

a line segment forming part of a polygon

side

15.

a polygon with 3 sides and 3 vertices

triangle

16.

a polygon with 4 sides and 4 vertices

quadrilateral

17.

a polygon with 5 sides and 5 vertices

pentagon

18.

a polygon with 6 sides and 6 vertices

hexagon

19.

a polygon with 8 sides and 8 vertices

octagon

20.

a polygon with 10 sides and 10 vertices

decagon

21.

a triangle with all sides the same length

equilateral triangle

22.

a triangle with at least two sides the same length

isosceles triangle

23.

a triangle with no sides the same length

scalene triangle

24.

a triangle with one right angle

right triangle

25.

a triangle with 3 acute angles

acute triangle

26.

a triangle with one obtuse angle

obtuse triangle

27.

a quadrilateral with only one pair of parallel sides

trapezoid

28.

a quadrilateral in which opposite sides are parallel

parallelogram

29.

a quadrilateral with four right angles. It is a special parallelogram

rectangle

30.

a quadrilateral with opposite sides parallel and all sides the same length. Opposite angles are obtuse and the other opposite angles are acute. It is a special parallelogram

rhombus

31.

a quadrilateral with 4 right angles and all sides the same length. it is a special parallelogram and a combination of a rectangle and rhombus

square

32.

a line segment other that a side that connects two vertices of a polygon

diagonal

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