Question

20.
Find the area of the quadrilateral PQRS in which PQ=7 cm, QR=6 cm RS= 12 cm, SP= 15 cm
and PR = 9 cm.​

Answer 1

Answer:

74.98 cm^2

Step-by-step explanation:

s = a + b + c /2 = 12 + 9 + 15 /2 = 18cm

Area of PRS = √s(s - a)(s - b)(s - c) = 54 cm^2

s = a + b + c /2 = 7 + 6 + 9 /2 = 11 cm

Area of RPQ = √s(s - a)(s - b)(s - c) = 20.98 cm^2

Area of Quadrilateral = Area of RPQ + Area of PRS

= 54 + 20.98

= 74.98 cm^2

Answer 2

answer is 74.98cm^2

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