Question

The question is no. 165.
Please also tell me why it is concave or convex.​

Answer 1

The above Attachment is for finding the difference between convex and concave quadrilateral.

ANSWER :

PQRS is convex quadrilateral.

Step-by-step explanation:

<P = 50

<Q = 50

<R = 60

<P+<Q+<R+<S = 360 ..........(angle sum property of quadrilateral)

50+50+60+<S = 360

160+<S = 360

<S = 360-160

<S = 200

In Convex quadrilateral, one angle must be Reflex i.e. more than 180 degree.

In PQRS, <S is also Reflex i.e. 200 degree

Hence, PQRS is convex quadrilateral.

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