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Veronika [31]
3 years ago
11

A four-sided polygon has sides that measure 1 cm, 5cm, and 7 cm. (Forth side not given). What is the perimeter?

Mathematics
1 answer:
yaroslaw [1]3 years ago
3 0

Answer:

(13+x)cm

Step-by-step explanation:

Given data

Length of sides

1cm, 5cm, 7cm

Since the shape is four-sided and the fourth side is not given, let the fourth side be x

so

The perimeter of the polygon is

P= 1+5+7+x

P= 13+x

Hence the perimeter of the polygon is

P= (13+x)cm

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Step-by-step explanation:

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What is the area of the white border?
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Answer:

A_{white} = 119\ cm^2

Step-by-step explanation:

<u>Step 1:  Determine the area of the black area</u>

A = l * w

A = 8\ cm * 2\ cm

A = 16\ cm^2

<u>Step 2:  Determine the area of the entire white and black area</u>

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<u>Step 3:  Determine the difference to just get the white area</u>

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Read 2 more answers
∆XYZ at X(–2,6), Y(3,0), Z(2,8) is reflected across the y-axis. What are the new coordinates of the triangle?
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Answer:

<em>Given </em><em>point </em><em>x(</em><em>-</em><em>2</em><em>,</em><em>6</em><em>)</em><em> </em><em>,</em><em> </em><em>y(</em><em>3</em><em>,</em><em>0</em><em>)</em><em> </em><em>and </em><em>z </em><em>(</em><em>2</em><em>,</em><em>8</em><em>)</em>

Step-by-step explanation:

<em>The </em><em>points </em><em>are </em><em>reflected </em><em>on </em><em>the </em><em>Y-axis </em><em> </em><em>so</em>

<em>x(</em><em>-</em><em>2</em><em>,</em><em>6</em><em>)</em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>x'(</em><em>2</em><em>,</em><em>6</em><em>)</em>

<em>y(</em><em>3</em><em>,</em><em>0</em><em>)</em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>y'</em><em>(</em><em>-</em><em>3</em><em>,</em><em>0</em><em>)</em>

<em>z(</em><em>2</em><em>,</em><em>8</em><em>)</em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>z'(</em><em>-</em><em>2</em><em>,</em><em>8</em><em>)</em>

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