Plz . what is the area of this figure?

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It should be 146 square cm. 

First, you would start off by finding the areas of the trapezoid. 

Formula- h (base+base 2) 1/2= Area
Formula- (4+14) 10 1/2 
Formula- 18 x 10 1/2
Formula- 180 1/2
Area- 90  squared cm

Next, we have to find the area of the triangle. This one is a little more tricky because the height is not given. I believe it goes like this- 

Formula- bh 1/2
Formula- 14 x 8 1/2 (The reason I chose 8 is because 10 is the height for the first one so 18-10=8)
Formula- 14x4
Area- 56 square cm

56 cm
 
hope this helps