Answer=10 10gram weights
10*10grams=100grams
therefore the weight would be even on both sides
14.4, 120% of 12 is 100+20, 12+2.4 is 14.4
The rectangle is 7 x 4 so the area is 28 sq cm
The triangle has a base of 4 and a height of 3.
The formula is A = 1/2 * b*h
You have 2 triangles so:
2(1/2)*4*3= 12 sq cm
Add together:
28 + 12= 40 sq cm
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