td0715
23.04.2020 •
Mathematics
For each problem, use the formula for area of a polygon A = 12 ap , where a is the length of the
apothem and p is the perimeter of the polygon, to find the area of the polygon.
Show the exact values of a and p on your figure and give your answers as exact values - no rounding – no decimals. Show all your work clearly. All polygons represented are regular polygons.
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Ответ:
Part 1) Triangle: and
Part 2) Square: and
Part 3) Hexagon 1: and
Part 4) Hexagon 2: and
Step-by-step explanation:
Part 1) we have an equilateral triangle
we know that
where
a is the apothem
P is the perimeter
step 1
Find the length side of the equilateral triangle
Let
b ----> the length side of triangle
we know that
The measure of each interior angle is 60 degrees
so
---> by TOA (opposite side divided by the adjacent side)
equate
step 2
Find the perimeter
step 3
Find the area
Part 2) we have a square
we know that
where
a is the apothem
P is the perimeter
step 1
Find the length side of the square
Let
b ----> the length side of the square
we know that
The diagonal is half the radius of the square
Applying the Pythagorean Theorem
we have
simplify
step 2
Find the perimeter
step 3
Find the area
The apothem is half the length side of the square
Part 3) we have a regular hexagon
we know that
where
a is the apothem
P is the perimeter
step 1
Find the length side of the hexagon
we know that
The length side of a regular hexagon is equal to the radius
Let
b ----> the length side of the hexagon
we have
----> the radius is half the diameter
step 2
Find the perimeter
step 3
Find the area
The apothem is the height of an equilateral triangle
Applying the Pythagorean Theorem
simplify
substitute in the formula of area
Part 4) we have a regular hexagon
we know that
where
a is the apothem
P is the perimeter
step 1
Let
b ---> the length side of the hexagon
we have
Find the perimeter
step 2
Find the area
The apothem is the height of an equilateral triangle
Applying the Pythagorean Theorem
simplify
substitute in the formula of area
Ответ:
3 and 6800
Step-by-step explanation: