if f(-1) is evaluated then the answer is (-1,-4)
1 and 3 are angles of depression
2 and 4 are angles of elevation.
Answer: 21 packages
Step-by-step explanation:
Khan Academy
Answer:
(16 + 8√3) in²
Step-by-step explanation:
The ratio of side dimensions for a 30°-60°-90° triangle are 1 : √3 : 2. If we call the horizontal dimension of the triangle its base, then its height (vertical dimension) will be √3×4 in. Of course the area of the triangle is ...
... A = (1/2)bh = (1/2)(4 in)(4√3 in) = 8√3 in²
The total sod area is the sum of the square area (16 in²) and the triangle area, so is ...
... area to cover = (16 +8√3) in²
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<em>Comment on problem dimensions</em>
The area involved here is not much larger than the size of your hand. It would make more sense for the dimensions to be in feet or yards or meters, rather than inches.
The easiest, simplest way to determine if a quadrilateral has a congruent angle is to pull out a protractor and measure the angles. How ever many angles have the same degrees is how many congruent angles a quadrilateral has.<span />