If the angles of a quadrilateral are (3y + 10)°, (2y + 30)°, (y + 20)° and 4y°. Find the value of y.
-
A.
66° -
B.
12° -
C.
30° -
D.
42°
Correct Answer: Option C
Explanation
Sum of angles in a quadrilateral = 360°
(therefore) (3y + 10) + (2y + 30) + (y + 20) + 4y = 360
10y + 60 = 360 (implies) 10y = 300
y = 30°
There is an explanation video available below.