Answer:
7 by 18
Step-by-step explanation:
The corner doesn't matter cut it off if you want the area
136 square cm
Area of rectangle = 18x7=126 square cm
Area of triangle = 1/2x(11-7)x(18-13) = 1/2(4)(5) = 10 square cm
126+10 = 136 square cm
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