Help with a Geometry Question

I will give only hints as this problem only requires basic addition and subtraction

The sum of the angles of Triangle ABC add up to 180

Line segment DBC is 180 degrees, and if DBA is 124, then what must be ABC?

This uses the Exterior Angle Theorem

It says that

measure of DBA  = measure of BAC + measure of  ACB

124  = 95  + measure of ACB    subtract 95 from both sides

29°  =   measure of ACB

A straight line is 180^o so 180^o – 124^o  =  56^o  =  angle ABC 

A triangle contains 180^o and so add ABC + BAC to see how much you need left over for BCA  

ABC + BAC  =  56^o + 95^o  =  151^o   

Since the whole triangle contains 180^o then BCA has to be 180^o – 151^o  =  29^o 

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