# Right Triangles

• Jun 19th 2005, 09:37 PM
mattballer082
running out of time!! help fast!
okay, some quick help..

i understand mostly everything, except, using similarity postulates. how do i know which one is what? can anyone show an example in a triangle to show when a triangle is AA (angle angle) or SAS (side angle side) ect..

how about, proving that 2 triangles are in proportion.. i dont understand the defenition of proportion or how to prove it.

one last thing i need help on, angles of a polygon.. how do you know when the figure is a polygon? or convex or non convex polygon..

hopefully if i get an A in the final, i will have the highest grade in the class.. please, if anyone can help me fast!!

thank you!!

-mattballer082
• Jun 20th 2005, 08:29 AM
Math Help
proportional triangle
how about, proving that 2 triangles are in proportion.. i dont understand the defenition of proportion or how to prove it.

If two triangles have the same three angles then they are in proportion of eachother. Note 3 angles congruent means similar shape but not necessarily the same size, therefore they are in proportion.
• Jun 20th 2005, 02:18 PM
mattballer082
thnks
thanks for the tip, luckily i got to see it before the test.. hopefully i did good on it, we will find out tomorrow!!!