Question

in a quadrilateral PQRS, angle P = 72° angle Q = 85°, angleR = 103°. Find angle S.​

Answer 1

Sum of all the angles of quadrilateral is 360.

So using this,

For a quadrilateral PQRS

angle P= 72°

Q=85°

R= 103°

Angle P+Q+R+S=360°

72°+85°+103+S=360°

260+S=360

S=360-260

S= 100

Angle S is 100 degree