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46 Cards in this Set
 Front
 Back
point

smallest geometric unit


line

set of points that extend indefinitely in two directions


line segment

portion of a line
has 2 endpoints 

ray

"half of a line"
has one endpoint extends indefinitely in one direction 

parallel lines

same slope
never intersect 

angle

formed with two rays that share the same endpoint;
measured in degrees with a protractor 

Types of Angles

1)Acute
2)Right 3)Obtuse 4)Straight 5)Reflex 

Acute Angle

measurements less than 90˚
(<90˚) 

Right Angle

measurements equals 90˚
(=90˚) 

Obtuse Angle

measurements are greater than 90˚, but less than 180˚
(90˚<x<180˚) 

Straight Angle

Measurement equals 180˚
(=180˚) 

Adjacent Angles

share a side and have a common vertex


Vertical angles

formed when two lines intersect
*have the same measure share a vertex, but not a side 

Complementary Angles

two angles that add up to 90˚


Supplementary Angles

two angles that add up to 180˚


Alternate Interior Angles

interior angles on opposite sides of the transversal
same measure 

Alternate Exterior Angles

exterior angles on opposite sides of the transversal
same measure 

corresponding angles

one interior and one exterior angle on the same side of the transversal
same measure 

polygon

closed figure in a plane determined by 3 or more line segments


triangle

smallest polygon
has 3 sides interior angles add up to 180˚ 

sum of interior measures of a polygon

(n2) X 180˚
(n is the number of sides of the polygon) 

regular polygon

lengths of sides are the same angle measurements are equal


similar polygon

same shape, but different size
angles are the same lengths of sides are proportional 

congruent figures

exactly the same
angles and sides are the same 

perimeter

the distance around the figure
add all sides (ft, in, m, cm, yd) 

Area

interior measurement of a bounded region 2 dimensional. is squared


Pythagorean Theorem

The sum of the square of the lengths of the legs of a right triangle equals the square of the length of the hypotenuse
a² + b²= c² 

circumference

distance around a circle
C=2∏r 

Area of a Circle

A=∏r²


Volume

measure of the capacity o a figure that is 3 dimensional


Triangle

3 sides
A=½bh 

Quadrilateral

4 sides2 triangles
Rectangle A=lw Square A=s² Parallelogram A=bh Trapezoid A=½h(b₁+b₂) 

pentagon

5 sides
3 triangles 

hexagon

6 sides
4 triangles 

heptagon

7 sides
5 triangles 

octagon

8 sides
6 triangles 

nonagon

9 sides
7 triangles 

decagon

10 sides
8 triangles 

volume of a rectangular solid

V= l X w X h


volume of a cube

V=s³


volume of a cylinder

V=∏r²h


volume of a cone

V=⅓∏r²h


volume of a sphere

V=⁴⁄₃∏r³


Euler's Polyhedron Formula

number of verticesnumber of edges+number of faces=2


Volume of a prism

V=Bh
where B is the area of a base 

volume of a pyramid

V=⅓Bh
where B is the area of the base 