How do we use the properties of trapezoids

Trapezoids : Exactly one pair of parallel side
Trapezoid Consecutive Angles Conjecture: the consecutive angle between the bases of a trapezoid
isosceles Trapezoid conjecture: The base angle of a isosceles trapezoid 

 for more help check out the links below

• http://www.youtube.com/watch?v=jKwY4OjfMS4
• http://www.cliffsnotes.com/study_guide/Properties-of-Trapezoids.topicArticleId-18851,articleId-18798.html
• http://www.coolmath.com/reference/trapezoids.html
• http://www.youtube.com/watch?v=fR_ctVqueo4

How do we use a polygon's exterior angles

to find the exterior of any angle we would have use the information given to use and if it is a regular shape.if the shape has all the interior angels then we know that all the exterior angles will be the same as well. then all we need to do is subtract 180 minus the interior angels to find the exterior angels.

 

 

 

 

we subtract 135 from 180 to give us 45

when we add up all the exterior angel we find that the sum is 360

for more help check out these websites

• http://www.mathsisfun.com/geometry/exterior-angles-polygons.html
• http://www.youtube.com/watch?v=MFhwb3UXNRI