Answer:
The best way to measure an angle is to use a protractor. To do this, you'll start by lining up one ray along the 0-degree line on the protractor. Then, line up the vertex with the midpoint of the protractor. Follow the second ray to determine the angle's measurement to the nearest degree.
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Factorise a² - b² :
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Crossed out common factors, (x + a) :
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Hi!
you are trying to find the perimeter of the lawn and by the looks of it, it's a rectangual so you would add up all the side.
42+42= 84
27+27= 54
84+54= 138
Daniel will need 138 metal border. :)
The answer is option B(07, 28, 29, 34, etc)
The reason is that it’s the only set with numbers that are under 40.
Hope that helps, if you don’t get it feel free to ask for help in comments
Answer:
It is the square (I'm assuming that one is D)
Step-by-step explanation:
Note that it specifically states that it is a "square pyramid". This means that the base is a square, and the other 4 sides create the pyramid.
Also note that the cross-section cuts by a plane "parallel to the base", suggesting that it will have the same shape as the base.
Since the base is a square, ∴ the plane cross-section will also be a square.
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