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| 1. |
{ In a quadrilateral }\operatorname{ROSE},\angle O=90^°,\angle S-\angle E=80^°}{ and }\angle R-\angle S-\angle E=50^° . Find the angles of the }} quadrilateral. |
| Answer» { In a quadrilateral }\operatorname{ROSE},\angle O=90^°,\angle S-\angle E=80^°}{ and }\angle R-\angle S-\angle E=50^° . Find the angles of the }} quadrilateral. | |