#$&*
course Mth 151
What is the area of a rectangle whose dimensions are 4m x 3m?L x W = 4x x 3m = 12 m^2
What is the area of a right triangle whose legs are 4.0 meters and 3.0 meters?
I believe that with the area of the right triangle you would take the longest leg and times it by the shortest leg and times that by the square root of two. Which would give you a total of 16.97 m^2
Self-Critique:
I over thought it and I think I was thinking more with something with geometry. But I remember that now. To find the area of a triangle is: A = 1/2bh
What is the area of the parallelogram whose base is 5.0 meters and whose altitude is 2.0 meters?
I believe with the area of parallelogram you take the base and times it by the altitude. Which would be the following:
5 m x 2 m = 10 m^2
What is the area of a triangle whose base 5.0 cm and whose altitude is 2.0 cm?
A = 1/2bh, so that means you would do the following:
½ * 5 cm * 2 cm = 5 cm^2
What is the area of a trapezoid with a width of 4.0 km and average altitude of 5.0 km?
A = w * h, so the answer would be the following:
4.0 km * 5.0 km = 20 km^2
What is the area of a trapezoid whose width is 4.0 cm and whose altitudes are 3.0 cm and 8.0 cm?
A = w * h, so the answer would be the following:
4.0 cm * (3)(8) cm = 96 cm^2
Self-Critique:
Was wrong on this one. I understand that you should of add the two altitudes, but not sure why you would divide once you add the two together.
What is the area of a circle whose radius is 3.00 cm?
The formula for a circle is: pie times r^2, so to work this out it would be the following:
Õ * 3.00^2 cm = Õ9cm^2 or 28.26 cm^2
What is the circumference of a circle whose radius is exactly 3 cm?
The formula for the circumference is as follows: C = 2 pi*r. So to work this would be done as follows:
C = 2 pi*3 cm = 6 pi cm^2 or 18.8 cm^2
Self-Critique:
I forgot about not having the ^2 on the answer. My bad.
What is the area of a circle whose diameter is exactly 12 meters?
You can do this two ways, one is you take the diameter and times it by pi or you can divide the diameter (12 m) by 2 and then you would use the formula pi*r^2.
A = pi*12 m, giving you an answer of 12 pi m^2 or 157.7 m^2
Self-Critique:
Missed this one up big time but I understand what I did wrong.
What is the area of a circle whose circumference is 14 pi meters?
The formula for a circle is: A = pi*r^2, so the problems should be worked out as follows:
14 pi m/2 = 7 pi m; A = pi 7m^2 = 49 pi m^2 or 153.9 m^2
What is the radius of circle whose area is 78 square meters?
Don’t remember how to do this. I know the radius is half the length of the circumference. I am wanting to thing that you do something with dividing. But not sure.
Self-Critique:
Completely lost on this one. I have no true clue on this.
&#In a good self-critique you need identify the specific things you do and do not understand in the given solution, and either demonstrate your understanding or ask specific questions about what you don't understand. It doesn't accomplish the intended learning goals to simply say that you or do not understand.
Once you have defined your difficulties, to the extent that it is possible for you to do so, I can help you address them. &#
How do you visualize the area of a rectangle?
You know that two sides are longer and the other two sides are shorter.
Self-Critique:
I guess I totally misunderstood the question that was being asked. But I do know that the formula for the area of a rectangle is A = L x W
@& It's also important to know what the area means. I expect that you did understand the given solution.
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How do we visualize the area of a right triangle?
This one is like the one before. The formula for the triangle is A = ½*b*h. But in the summary for the answer you mentioned that you could remember that if you put two right triangles together at their hypotenuses then you have a rectangle.
How do we calculate the area of a parallelogram?
The formula to find the area of a parallelogram is A = b*h
Self-Critique:
I am meaning the same thing but I but the base and height not the altitude. I need to remember not to say (h).
@&
'Height' and 'altitude' mean the same thing in this context. 'Altitude' is the more precise term, but I used 'height' here because it is more a little more informal, and familiar to some students.
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How do we calculate the area of a trapezoid?
Just like the parallelogram, the formula for the trapezoid is: A = base times altitude.
How do we calculate the area of a circle?
You take the diameter and divide it by two. If you are given the radius then you will doing the following: A = pi * r^2
How do we calculate the circumference of a circle? How can we easily avoid confusing this formula with that for the area of circle.
The formula for C = 2 pi * r; just remember to avoid confusing the formulas of the circumference and area of the circle is that the C has you times the pi and radius by 2 not by the ^2.
Explain how you have organized your knowledge of the principles illustrated by the exercises in this assignment?
To be honest I saw the first question so I decided to write down the formulas as I could remember them, plus with each question I would write the question down and draw the shape and put the formula down and work it on paper before actually putting in the computer."
@&
What you describe here is exactly the approach I recommend you use in this course. Very good.
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@& You are doing very well here. Do see my notes.
See also my notes on previous assignments, including the important note to insert your comments into the documents, but not to delete anything from them. Among other things, the given solutions will make the documents posted to your Access Page much more useful to you.*@