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yaroslaw [1]
4 years ago
5

I have gone mind blank. How do you find area and perimeter? For squares, triangles, and polygons.

Mathematics
1 answer:
Dahasolnce [82]4 years ago
4 0
Area:
Square- Multiply 2 sides together
Triangle- Multiply base by the height and divide by 2
Polyon- (I forgot how to find this sorry)

Perimeter:
Square- Add all 4 sides
Triangle-Add all 3 side (a+b+c)
Polygon- Add all the sides
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The length of a rectangle is nine inches more than the width. The perimeter is 46 inches. Find the length and width. Please show
devlian [24]

Answer:

W=7 L= 16

Step-by-step explanation:

you start off with

   P=2L+2W   (the equation to find perimeter)

the equation gives you the perimeter = 46

so you plug that in

     46=2L +2W

then it says the length IS (which also means equals) 9 plus the width

so you then get another equation:

    L=9+W

you take that and plus it into the first equation/ substitute the new equation for L in the first equation

     46=2(9+W)+2W

you solve that and get

   w=7

you plus the 7 in for the w

L=9+7 = 1

W=7 L=16

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4 years ago
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3 years ago
The area of a rectangle is x^2-4/2x in.^2 and its length is (x+2)^2/2 in. What is the width in inches?
Over [174]
Is b I’m sure check
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3 years ago
If f(x)=4x-11 what is the value of f(5)
Annette [7]

f(5) = 4(5) - 11

f(5) = 20 - 11

f(5) = 9

The answer is 9 :)

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5 0
3 years ago
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What operation should be used to solve the equation 5n = 45?
bulgar [2K]

Answer:

n = 9

Step-by-step explanation:

divide 45 by 5 to find n

45/5 = 9

7 0
3 years ago
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