Answer:
No
Step-by-step explanation:
By using the Pythagoras theorem, it can be easily determined that whether the triangle is right triangle or not.
Thus, 
where where a and b are the legs and c is the hypotenuse.
Let a=6ft, b=21ft and c=23ft, then
which is not possible, therefore the given triangle is not right triangle because it does not satisfy the Pythagoras theorem.
Answer:
Step-by-step explanation:
what question?
-8/5 is a rational number because in order to be a rational number it must be able to be written as a fraction. -8/5 is a fraction; therefore, the negative does not affect it.
Answer:
angle6=angle8=71
Since no need step by step explanation, I'll just tell you the answer!
Factoring the polynomial 
by grouping means separation of the polynomial in two addends, each of them consists of two addends:
In first brackets the common factor is 
in second brackets the common factor is 
Then
Answer: correct choice is B
