Find the missing length. Round to the nearest tenth if necessary. side=8 and 21
A. 441
B. 22.5
C. 64
D. 19.4
PLZ help me i have no idea how to do this
Apparently you have a right triangle. Use the Pythagorean Theorem:
a ^2 + b^2 = c^2
the problem is i'm trying to find the length for B i have a and c already
Just plug the numbers in to the formula.
To find the missing length, 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.
Let's assume that the missing length is x. We are given the lengths of the other two sides: 8 and 21.
Using the Pythagorean theorem, we can set up the following equation:
x^2 = 8^2 + 21^2
x^2 = 64 + 441
x^2 = 505
To solve for x, we need to find the square root of both sides:
x = √(505)
Using a calculator, we find that the square root of 505 is approximately 22.5.
Therefore, the missing length is approximately 22.5.
The correct answer is B. 22.5.