ok so the complete measurement is 180° so youll need to subtract 116° from that and because the 2 other unknown measurements are both the same you'll just divide 116° by 2 and that's your answer
here's the formula
[tex](180 - 116) \div 2 = 64 \div 2 = 32[/tex]
therefore x=32°
hope this was helpful:)
