Ruth's Theorms diagrams

VOA are congruent.
<4=<2














Corresponding angles
<1=<5 2="<6">
<4=<8 3="<7">
















Alternate Interior Angles
<3=<6
<4=<5>
















Alternate Exterior Angles
<1=<2 <7=<8

Co-interior Angles
<1=<6 <4=<7>
The sum of interior angles is 180 degrees.


In a 30, 60, 90 degree triangle, the side opposite the 30 degree angle in half the Hypotenuse.