Internal and external angles

Calculate the remaining internal and external angles of a triangle, if you know the internal angle γ (gamma) = 34 degrees and one external angle is 78 degrees and 40 '. Determine what kind of triangle it is from the size of its angles.

Correct result:

α =  101.3333 °
β =  44.6667 °
γ =  34 °
α' =  78.6667 °
β' =  135.3333 °
γ' =  146 °

Solution:

α=180(78+40/60)=101.3333=10120
β=180(180(78+40/60)+34)=44.6667=4440
γ=34=34
α=78+40/60=78.6667=7840
β=180(78+40/60)+34=135.3333=13520
γ=18034=146



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