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140 degree and 40 degree
Step-by-step explanation:
let the unknown angles be x so that one angle will be 7x and the other 2x
90° + 90° + 7x+ 2x = 360°
180° + 9x = 360°
9x = 360° - 180°
9x = 180°
x = 180° ÷ 9
therefore x = 20
so angle 1 = 7 × x = 7×20 = 140
angle 2 = 2 × x = 2×20 = 40
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