If AB = 21 centimeters, and BC = 28 centimeters, which does AC equal?
What are your alternatives? However, AC must be > 7.
this answer is incorrect .
To find the length of AC, we can use the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.
In this case, AB and BC are given as 21 centimeters and 28 centimeters, respectively, and we want to find the length of AC.
We can consider ABC as a right triangle, with AC as the hypotenuse, and AB and BC as the other two sides.
Using the Pythagorean theorem, we can write the equation:
AC^2 = AB^2 + BC^2
Substituting the given values, we have:
AC^2 = 21^2 + 28^2
AC^2 = 441 + 784
AC^2 = 1225
Taking the square root of both sides, we get:
AC = √1225
AC = 35 centimeters
Therefore, the length of AC is 35 centimeters.