cassadeertte
cassadeertte
18-06-2017
Mathematics
contestada
Does anyone know x??
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Banabanana
Banabanana
18-06-2017
diagonals are perpendicular, so we have a right-angled triangle, and we can write equation:
2x-15+3x=180-90
5х - 15 = 90
5х = 90 + 15
5х = 105
х = 105 : 5
x = 21°
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