SOLUTION: Hi, I need help with this problem! https://imgur.com/a/8IqmF

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Question 1100102: Hi, I need help with this problem!
https://imgur.com/a/8IqmF
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Area of rectangle (all of it) is 20cm*9cm=180 cm^2
Area of the triangle (not shaded) is (1/2)bh; base is 11 cm (20-5-4) and height is 9 cm, the width of the rectangle.
The area of the triangle is (1/2)*99=49.5 cm^2
The shaded area is 180-49.5=130.5 cm^2