1. 2a+ 3a= 90°
5a= 90°
a=18
2.46°+(a+29)°+(5a+15)°=180°
90°+ 6a=180°
6a=180°-90°
6a=90°
a=15
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1. 2a+ 3a= 90°
5a= 90°
a=18
2.46°+(a+29)°+(5a+15)°=180°
90°+ 6a=180°
6a=180°-90°
6a=90°
a=15