If the angles of a quadrilateral are (3y + 10)°, (2y + 30)°, (y + 20)° and 4y°. Find the value of y.
Answer Details
In any quadrilateral, the sum of its interior angles is always 360 degrees.
Therefore, we can write an equation using the given angles as follows:
(3y + 10)° + (2y + 30)° + (y + 20)° + 4y° = 360°
Simplifying the equation:
10y + 60 = 360
10y = 300
y = 30
Hence, the value of y is 30.
Therefore, option C, "30°", is the correct answer.