The answer is C. This is because a equilateral triangle's sides are all equal, meaning any side divided by another has a ratio of 1. That means that you can use dilations to change a triangle into any length and then move them onto each other.
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Benchmark are numbers that are used as standards to which the rest of the data is compared to. When counting numbers using a number line, the benchmark numbers are the intervals written on the axis. For benchmark numbers of 10, the number line on top of the attached picture is shown. Starting from 170, the tick marks are added by 10, such that the next numbers are 180, 190, 200, and so on and so forth. When you want to find 410, just find the benchmark number 410.
The same applies to benchmark numbers in intervals of 100. If you want to find 170, used the benchmark numbers 100 and 200. Then, you estimate at which point represents 170. For 410, you base on the benchmark numbers 400 and 500.
I’m pretty sure it’s the first option
He volume of the right rectangular prism is 120