We know that the interior angles of any triangle equal 180. Therefore in the left triangle, C must equal 53 in order for the interior angles to equal 180° (65+62+53)
Since these triangles are equal they are congruent. Congruent triangles share the same angles. Therefore C is equal to G. If c is 53 then m<G is also 53. x=53
Additionally, the side lengths of congruent triangles are equal. Therefore 11 is equal to x-y
