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mash [69]
3 years ago
11

Find the measure of each exterior angle of a regular decagon?

Mathematics
1 answer:
Igoryamba3 years ago
5 0
The measure of exterior all angles of a regular n-agon is 180
now for the decagon which has 10 angles is 180/10=18
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The length of a rectangle is 5 centimeters less then twice it's width. The perimeter of the rectangle is 26 cm. What are the dim
Sedaia [141]

Answer:

The dimensions of the rectangle are length = 7cm and width = 6cm.

Step-by-step explanation:

In order to solve for the dimensions, you will need to set up two equations in order to solve for the missing variable.  Given the information that the length is 5 cm less then twice it's width, using 'L' for length and 'w' for width we get the following equation:  L = 2w - 5.  Perimeter is the sum of all the sides, or in the case of a rectangle P = 2w + 2L.  We can then use our expression for 'L' in our perimeter formula:  26 = 2w + 2(2w - 5).  First, using the distributive property we get: 26 = 2w + 4w - 10.  Next, we combine like terms:  26 = 6w - 10.  Then, we use inverse operations to isolate the variable:  26 + 10 = 6w - 10 + 10 to get 36 = 6w, divide both sides by 6 to get w = 6.  Lastly, plug in the value of 'w' to 'L':  L = 2(6) - 5 or L = 7.

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3 years ago
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Nesterboy [21]

Answer:

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Why are 5 and -5 opposites?
Orlov [11]

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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