One angle of an isosceles triangle measures 50°. Which other angles could be in that isosceles triangle? Choose all that apply
1 answer:
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Answer:
Volume of a cube= 1/8 cubic meter
We know that volume of a cube= side x side x side
=
From here, we get side of cube= meter
Hence, the side of a cube = meter
We have to find a fraction, when it is multiplied by itself
x
=
Here we get our answer
She's correct, but not for the right reasons. The sum of any two rational numbers <em>is </em>rational, but simply giving one example of that being the case isn't enough. In fact, Andrea could have done <em>billions </em>of similar cases and always found that there was one case she hadn't tested. What we need here is a proof, and here it is.
Let's say we have two rational numbers and
, where a, b, c, and d are all integers. Adding the two numbers together, we find that their sum is
Since the sum or product of any two integers is always another integer, we know that both ad + cb and bd are integers, and since the definition of a rational number is a ratio of two integers, we can say with 100% certainty that is rational, which means that <em>the sum of any two rational numbers is also rational</em>.