Get detailed and accurate responses to your questions on IDNLearn.com. Our experts are available to provide accurate, comprehensive answers to help you make informed decisions about any topic or issue you encounter.

Question 14

A triangle has vertices [tex]\( A(1,4) \)[/tex], [tex]\( B(-3,-2) \)[/tex], and [tex]\( C(3,0) \)[/tex]. Determine the exact length of the median from vertex [tex]\( A \)[/tex].


Sagot :

Certainly! To determine the length of the median from vertex [tex]\( A(1,4) \)[/tex] to the midpoint of the side [tex]\( BC \)[/tex] in the triangle with vertices [tex]\( A(1,4) \)[/tex], [tex]\( B(-3,-2) \)[/tex], and [tex]\( C(3,0) \)[/tex], follow these steps:

1. Find the Midpoint of Side [tex]\( BC \)[/tex]:
The formula to find the midpoint [tex]\( M \)[/tex] of a line segment with endpoints [tex]\( (x_1, y_1) \)[/tex] and [tex]\( (x_2, y_2) \)[/tex] is:
[tex]\[ M = \left(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2}\right) \][/tex]
For points [tex]\( B(-3, -2) \)[/tex] and [tex]\( C(3, 0) \)[/tex]:
[tex]\[ \text{Midpoint } M = \left(\frac{-3 + 3}{2}, \frac{-2 + 0}{2}\right) = (0.0, -1.0) \][/tex]

2. Calculate the Length of the Median:
The median from vertex [tex]\( A \)[/tex] to the midpoint of [tex]\( BC \)[/tex] is the distance between the points [tex]\( A(1, 4) \)[/tex] and [tex]\( M(0.0, -1.0) \)[/tex].
The distance formula between two points [tex]\( (x_1, y_1) \)[/tex] and [tex]\( (x_2, y_2) \)[/tex] is:
[tex]\[ \text{Distance} = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \][/tex]
Using the coordinates [tex]\( A(1, 4) \)[/tex] and [tex]\( M(0.0, -1.0) \)[/tex]:
[tex]\[ \text{Distance} = \sqrt{(0.0 - 1)^2 + (-1.0 - 4)^2} \][/tex]
[tex]\[ = \sqrt{(-1)^2 + (-5)^2} \][/tex]
[tex]\[ = \sqrt{1 + 25} \][/tex]
[tex]\[ = \sqrt{26} \][/tex]
[tex]\[ = 5.0990195135927845 \][/tex]

Thus, the midpoint of side [tex]\( BC \)[/tex] is at [tex]\( (0.0, -1.0) \)[/tex], and the length of the median from vertex [tex]\( A \)[/tex] to this midpoint is approximately [tex]\( 5.099 \)[/tex].