Parallel Line Problems

You must email your answers to Mr. Widmer ( widmerjo@werribeesc.vic.edu.au ) by the end of the week!

Find the missing angles a^o ,b^o,c^{^o} ,d^{^o} Use this Geogebra template to solve one of these problems!
Find the missing angles t^o , x^o, y^{^o} , z^{^o} Use another Geogebra template to solve one of these problems!
Find all the missing angles! Use a completely different Geogebra template to solve one of these problems!