I believe the side-side postulate is NOT a valid way of showing that two triangles are similar.
C) mountains
I just did this and it is the right answer
Well, Africa is a continent that is very rich in terms of resources, and is readily developing as a nation. One reason would that solar energy would be one of the main sources because of its open land, second, the available waters fr hydroelectric and wind. And lastly, the nation is still coming of age, where many ideas could still be implemented in the region such as renewable energy.
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The correct answer for the problem is 2 cylinders. Taking the volume of each cylinder gives a value of around 180 cm^3. Since the volume of one solid block is 360 cm^3, the value should be divided by the volume of the gold cylinder to know how many cylinders are needed. Dividing 360 by 180 gives 2.