Diagram 1 shows a cyclic quadrilateral PQRS. Given that PQR=130°, PQ=5 cm, QR = 7.3 cm and RS = 11.8cm.
Calculate
(a) the length of PR,
(b) ZPRS,
(c) the area of quadrilateral PQRS.
(d) the shortest distance, in cm, from point S to PR.​

$113.42

i hope that is right.

step-by-step explanation:

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.