Answer
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Hint: In order to solve the problem use the figure and simple visualization. Basic definitions of quadrilateral will be used to solve the second part of the problem.
Complete step-by-step answer:
For the quadrilateral PQRS
Sides: $PQ,QR,RS,SP$
Angles: $\angle PQR,\angle QRS,\angle RSP,\angle SPQ$
Vertices: $P,Q,R,S$
Diagonal: $PR,QS$
Pairs of adjacent sides:
$\left\{ {PQ,QR} \right\},\left\{ {QR,RS} \right\},\left\{ {RS,SP} \right\},\left\{ {SP,PQ} \right\}$
Pairs of adjacent angles:
$\left\{ {\angle PQR,\angle QRS} \right\},\left\{ {\angle QRS,\angle RSP} \right\},\left\{ {\angle RSP,\angle SPQ} \right\},\left\{ {\angle SPQ,\angle PQR} \right\}$
Pairs of opposite sides:
$PS,QR{\text{ and }}QP,RS$
Pairs of opposite angles
$\angle QRS,\angle SPQ{\text{ and }}\angle RSP\angle PQR$
Note: A quadrilateral is a polygon with four edges and four vertices or corners. Adjacent sides are sides of a polygon that have a common vertex. Two angles are Adjacent when they have a common side and a common vertex (corner point) and don't overlap.
Complete step-by-step answer:
For the quadrilateral PQRS
Sides: $PQ,QR,RS,SP$
Angles: $\angle PQR,\angle QRS,\angle RSP,\angle SPQ$
Vertices: $P,Q,R,S$
Diagonal: $PR,QS$
Pairs of adjacent sides:
$\left\{ {PQ,QR} \right\},\left\{ {QR,RS} \right\},\left\{ {RS,SP} \right\},\left\{ {SP,PQ} \right\}$
Pairs of adjacent angles:
$\left\{ {\angle PQR,\angle QRS} \right\},\left\{ {\angle QRS,\angle RSP} \right\},\left\{ {\angle RSP,\angle SPQ} \right\},\left\{ {\angle SPQ,\angle PQR} \right\}$
Pairs of opposite sides:
$PS,QR{\text{ and }}QP,RS$
Pairs of opposite angles
$\angle QRS,\angle SPQ{\text{ and }}\angle RSP\angle PQR$
Note: A quadrilateral is a polygon with four edges and four vertices or corners. Adjacent sides are sides of a polygon that have a common vertex. Two angles are Adjacent when they have a common side and a common vertex (corner point) and don't overlap.
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