R-56 Transversals

R-56 Transversals

What do we notice?



















*Supplementary <'s-2 ,<'s add to 180

1. b and c make up line 1
2. a and d make up other sides of line 1
3. a and b make up line 2
4. d and c male up line 2

-all ,'s together=360 degrees
-Does A=C??
-Does B=D??
The class thinks they look the same. Someone thinks because the lines intercept
-If I moved one of the lines, they would still be the same.
-Line 1 is splitting like a circle in half, 180+180=360
-They look like interior <'s
-They make 4 different triangles or 2 different triangles. 

Class is wondering: Why does a=c and b=d? How can we prove/justify?

Line 1=180
Line 2=180

If b+c=180 and a +d=180
a+b=180 and c+d=180

a+b=180
a+d=180 so b=d

a+d=180
80+100=180

c+d=180
80+100=180