Creating a proof

Problem:



Solution:

#	Statement	Reason
1	< 1 = < 3	Given
2	<2 = < 4	Given
3	<ABC = <1 + <2	Evident when looking at the diagram
4	<DEF = <3 + <4	Evident when looking at the diagram
5	<ABC = <3 + <2	Combining #1 and # 3 and simplify
6	<ABC = <3 + <4	Combining #5 and # 2 and simplify
7	<ABC = <DEF	Combining #6 and # 4 and simplify