Question

c) The sides of a quadrilateral measure 9 cm, 40 cm, 28 cm, and 15 cm. The sides
measuring 9 cm and 40 cm make a right angle. Find the area of the quadrilateral.
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Answer 1

Answer:

8+40+28+15+9+40=141.

area of quadrilateral =141

Answer 2

Answer:

390 $cm^{2}$

Step-by-step explanation:

In Quadrilateral PQRS

PQ = 9CM

QR = 40CM

RS = 28CM

PS = 15CM

It has two triangle

Triangle PQR and Triangle PRS

In triangle PQR ,  

Area of triangle PQR = 1/2 × AB ×BC

= (1/2×9×40) CM²

= 180 CM²

In triangle PRS ,

Area of triangle PRS = 1/2×CD×AD

= (1/2×28×15) CM²

= 210 CM²

Area of Quadrilateral ABCD = 180 CM²+210CM²

= 390 CM²

HOPE IT HELPS!!!