The quadrilateral is a rhombus because all the sides are equal
The value of angle x is 76⁰.
The value of y is 4.
The missing angle x
The opposite angles of a rhombus are equal.
The value of x
The sum of angles of the rhombus must sum up to 360
x + x + 104 + 104 = 360
2x + 208 = 360
2x = 360 - 208
2x = 152
x = 152/2
x = 76⁰
The value of y
All the sides of the quadrilateral are equal.
3y = y + 8
2y = 8
y = 4
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