Angle Addition Exploration

Problem 1
[size=150]Make [math]\angle[/math]DBC= [math]20^\circ[/math] and [math]\angle[/math]DBA=[math]38^\circ[/math], what is [math]m\angle ABC=?[/math][/size]
Problem 1
Problem 2
[size=150]Make [math]\angle[/math]DBC= [math]75^{\circ}[/math] and [math]\angle[/math]DBA=[math]126^{\circ}[/math], what is [math]m\angle ABC=?[/math][/size]
Problem 2
Problem 3
[size=150]Make [math]\angle[/math]DBC= [math]26^{\circ}[/math] and [math]\angle[/math]DBA=[math]43^{\circ}[/math], what is [math]m\angle ABC=?[/math][/size]
Problem 3
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– Marlin Bynum, Philip Taylor, Jill Alsman, spencerkingman

Information: Angle Addition Exploration