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Mariana [72]
3 years ago
9

1. answer the three questions below about the quadrilateral:

Mathematics
2 answers:
mars1129 [50]3 years ago
8 0

Before we begin, note that we need to use the distanse formula for everything to reach our conclusion. With that being said, here we go:

\displaystyle \sqrt{[-x_1 + x_2]^2 + [-y_1 + y_2]^2} = d

Using the ordered pairs \displaystyle [3, -3] and \displaystyle [4, -2] for instanse:

\displaystyle \sqrt{[-3 + 4]^2 + [3 - 2]^2} = \sqrt{1^2 + 1^2} = \sqrt{2}

Now, sinse the <em>distanse</em><em> </em>between \displaystyle [3, -3] and \displaystyle [4, -2] is \displaystyle \sqrt{2} units, then the distanse between \displaystyle [1, 1] and \displaystyle [0, 0] ALSO has to be \displaystyle \sqrt{2} units. By definition, lettre <em>c</em><em> </em>has already been answered for you because sinse it is a rectangle, if the two short sides are congruent, then the two long sides ALSO have to be congruent, but just in case you want to be sure [you do not trust your instincts], just simply re-use the distanse formula.

Using the ordered pairs \displaystyle [1, 1] and \displaystyle [4, -2] for instanse:

\displaystyle \sqrt{[-1 + 4]^2 + [-1 - 2]^2} = \sqrt{3^2 + [-3]^2} = \sqrt{9 + 9} = \sqrt{18} = 3\sqrt{2}

So there you have it. The length of both of the long sides is \displaystyle 3\sqrt{2} units.

Now that we cleared all of that up, we can now find the perimetre and area of this rectangle:

\displaystyle 2w + 2l = P

\displaystyle 2[\sqrt{2}] + 2[3\sqrt{2}] = 2\sqrt{2} + 6\sqrt{2} = 8\sqrt{2}

The perimetre of this rectangle is \displaystyle 8\sqrt{2} <em>units</em>.

\displaystyle wl = A

\displaystyle [\sqrt{2}][3\sqrt{2}] = [3][2] = 6

The area of this rectangle is \displaystyle 6 <em>squared units</em>.

You have now found what you were looking for.

** All rectangles are parallelograms because they both have two pairs of parallel and congruent sides, while vice versa is falce because a parallelogram does not have <em>four congruent right angles</em>, so it is safe to say that this is both a rectangle AND parallelogram, sinse the picture displayed is a rectangle.

I am joyous to assist you at any time. ☺️

Ratling [72]3 years ago
4 0

9514 1404 393

Answer:

  a) compute and add up the side lengths

  b) multiply length by width

  c) compare the slopes of adjacent sides

Step-by-step explanation:

a) The perimeter of any figure is the sum of the lengths of its sides. It can be computed for a rectangle or parallelogram by adding the lengths of adjacent sides and multiplying the sum by 2.

In this graph, each grid square is 1/2 unit. The width of the rectangle is the diagonal of a square that is 1 unit on a side, so is √2 units. The length is 3 times that, so the perimeter is ...

  P = 2(L+W)

  P = 2(3√2 +√2) = 8√2 . . . . perimeter of the rectangle in units

__

b) The area is the product of the length and width.

  A = LW

  A = (3√2)(√2) = 6 . . . . area of the rectangle in square units

__

c) Each side lies on the diagonal of a unit square. The diagonals of a square are perpendicular, so the sides of this parallelogram are perpendicular. That means the figure is a rectangle.

The basic idea is to look at adjacent sides to see if they are perpendicular. Here, we have determined that using the properties of a square. One could compute "rise"/"run" for each side to see of the values are opposite reciprocals.

  origin to B: rise/run = 1/1 = 1

  B to C: rise/run = -3/3 = -1

Each of these values is the opposite reciprocal of the other: 1 = -1/-1.

_____

<em>Additional comment</em>

This question seems to be about methods, not about numbers. We have given numbers anyway.

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Answer:

c. 2

Step-by-step explanation:

Given : X = No. of hours worked

           No. of people work for the manager = 50

           X = 3, 4 , 5 , 6 , 7, 8

           P(X) = 0.1 , ? , 0.14 , 0.3 , 0.36 , 0.06

To Find : No. of people work for four hours

Solution : First understand the fact that sum of all probabilities is equal to 1

So, sum of all values of P(X) = 1

⇒0.1+?+0.14+0.3+0.36+0.06 = 1

⇒0.96+? = 1

⇒?= 1-0.96

⇒? = 0.04

So, the probability of no. of people worked for 4 hours is 0.04.

⇒P(4)=0.04

Thus , To calculate no. of people work for four hours :

0.04\times 50

⇒ 2 no. of people work for four hours per shift .


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