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devlian [24]
2 years ago
14

PLEASE HELP ASAP! Find the area of quadrilateral ABCD in each case.

Mathematics
1 answer:
Arisa [49]2 years ago
6 0

Answer:

The area is 5 units²

Step-by-step explanation:

∵ The area of the square of side length 3 which contains

   the quadrilateral ABCD = 3 × 3 = 9 units²

∵ The area of the 4 triangles on the sides of the quadrilateral ABCD

   = 1/2(2)(1) + 1/2(1)(2) + 1/2(2)(1) + 1/2(1)(2) = 4 units²

∴ The area of quadrilateral ABCD = 9 - 4 = 5 units²

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