Question

In a quadrilateral PQRS , if angle P = 85° , angle Q = 105° , angle R = 120° ; find angle S​

Answer 1

Answer:

The degree of a quadrilateral is=360⁰.

p=85⁰.

Q=105⁰.

R=120⁰.

value of s=

let s=X.

85⁰+105⁰+120⁰+X=360⁰.

310⁰+X=360⁰.

X=360⁰-310⁰.

X=50⁰.

So,the value of s=50⁰.

Answer 2

Answer:

By angle sum property- <P+<Q+<R+<S= 360°

=> 85°+105°+120°+<S=360°

=> 310+<S=360°

=> <S =360°-310

=> <S =50°