Answer:
hmm length x breadth... I'd simple formula
Answer:
slope = 
Step-by-step explanation:
Given the two points on the graph: (-1, 2) (-5, -3)
Let (x1, y1) = (-1, 2)
(x2, y2) = (-5, -3)
We can use the following slope formula:

Substitute the values into the slope formula:

Therefore, the slope of the line is: 
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Answer:
72 ft
Step-by-step explanation:
The perimeter of the concrete walk is the sum of the lengths of its outside edges. Each of those is two border-widths longer than the parallel pool dimension.
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The border width is ...
(10 ft) + 2(3 ft) = 16 ft
The border length is ...
(14 ft) + 2(3 ft) = 20 ft
The perimeter is the sum of the lengths of the four sides. It can be found using the formula ...
P = 2(L +W)
P = 2(20 ft + 16 ft) = 2(36 ft) = 72 ft
The perimeter of the concrete walk is 72 feet.
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<em>Additional comment</em>
The term "perimeter of the concrete walk" is actually somewhat ambiguous. It could refer to the total length of all of the edges of the concrete walk. If that is the case, then the 48 foot length of the inside edge must be added to the length of the outside edge for a total of 120 feet. That is, if one were to mark the edges of the walk with tape, for example, 120 feet of tape would be needed.
This question requires us to use the cosine rule:
a^2 = b^2 + c^2 - 2bc*cos(A),
where A is the included angle between sides b and c, and a is the side of the triangle opposite to the angle.
In the context of the question, a is the length of the tunnel (let's call this t), b is 6 km, c is 7 km and A is 29°.
Given the values in the question and those we defined, we can rewrite the equation for the cosine rule as:
t^2 = 6^2 + 7^2 - 2(6)(7)cos(29)
Now, evaluating this we get:
t^2 = 36 + 49 - 84cos(29)
t^2 = 85 - 84cos(29)
t = sq.root (85 - 84cos(29))
= 3.40 km (rounded to two decimal places)
Answer & Explanation:
As we know exterior angle of polygon is supplementary of the interior angle. So we will calculate interior angle first. Since decagon is regular so all angles will be same. Each exterior angle of a decagon will be 36°.