2021danaejalang
24.04.2021 •
Mathematics
Add u and 8, then divide t by the result
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Ответ:
Step-by-step explanation:
Angles in a triangle add up to 180°
30° + 80° =110°
180° - 110° = 70°
Angles in a straight line add up to 180°
70°+ 90°+x =180°
160°+x =180°
x =180°-160°
x =20°