There's only one tricky bit.
Because AS || BT we know <5 =<2
let <4 = <5 = x
working in degrees
2x+<3 = 180 as the sum of interior angles of a triangle is 180 degrees
<1 + <2 + <3 = 180 as these angles make up a straight angle
subtract the 1st from the 2nd equation
<1 + <2 - 2x = 0
<1 + <2 = 2x
Now <5=<2 = x
<1 + x = 2x
<1 = x
<1 = x = <2
<1 = <2
Hello, funnyguy287!
I don't have a two-column proof.
I'll show you my steps.
I'll let you break it up into Statements and Reasons.
Code:B * *6*5* * * * A * * * * * * * * * * * * 2 * * * 1 * * 3 4 * * * * * * * * * * * * * * * * * * R S T
Since
In
We have: .
. .
. .
. .
Since we have: .