Answer:
Step-by-step explanation:
If perimeter is 28 then each side is 28/7=4ft These sides can be seen as the bases of seven triangles that make up the heptagon. The apothem, 4.2ft, is the height of each of those triangles. The total area will be the sum of the areas of those seven triangles.
A=7(bh)/2
A=(7(4)4.2)/2
A=58.8 ft^2
It is supposed to be right angle(90 degree)
Answer:
23/56 centimeters
Step-by-step explanation:
all of the variables have a common denominator, so you can effectively ignore the denominator when solving.
1. you start off with 34/56 centimeter of chalk and Brian breaks off 23/56 centimeters worth, leaving you with 11/56 centimeters

2. Sara then added 12/56 centimeters worth, making the final amount 23/56 centimeters of chalk

An equation to summarize all of this is:

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