How to do this question plz

Mathematics

1 answer:

andre [41]2 years ago

7 0

The correct answer is : 340 cm^2

Explain

Trapezium area
1/2h (a+b)

Base area = 1/2h (a+b)

Base area = 1/2(3)(8+12)

As 20/2 = 10

Base area = 3(10)

Base area = 30 cm^2

Use perimeter: 28

Base Area = 30
Height = 10

Surface area = 2(30)+28(10)

Surface area= 60+ 280

Surface are = 340

Glad this help you

Good luck :-D

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