keellyxoxo
keellyxoxo
15-12-2017
Mathematics
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carlafossil320
carlafossil320
19-12-2017
When the quadrilateral is split into 2 triangles, they are isosceles (as two sides are equal, given in the image) so the base angles are equal. Angles in a triangle sum to 180° so (180-82)/2= 49°, a.k.a the value of angle y.
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