Answer:
Part 1) The slope of JK is [tex]m_J_K=-\frac{1}{3}[/tex]
Part 2) The slope of KL is [tex]m_K_L=3[/tex]
Part 3) The slope of JL is [tex]m_J_L=-7[/tex]
Part 4) Triangle JKL is a right triangle because two of these slopes have a product of -1
Step-by-step explanation:
we know that
If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes is equal to -1)
The formula to calculate the slope between two points is equal to
[tex]m=\frac{y2-y1}{x2-x1}[/tex]
we have
[tex]J(0, 2), K(3, 1),L(1, -5)[/tex]
Part 1) Find the slope JK
we have
[tex]J(0, 2), K(3, 1)[/tex]
substitute in the formula
[tex]m=\frac{1-2}{3-0}[/tex]
[tex]m_J_K=-\frac{1}{3}[/tex]
Part 2) Find the slope KL
we have
[tex]K(3, 1),L(1, -5)[/tex]
substitute in the formula
[tex]m=\frac{-5-1}{1-3}[/tex]
[tex]m_K_L=\frac{-6}{-2}[/tex]
[tex]m_K_L=3[/tex]
Part 3) Find the slope JL
we have
[tex]J(0, 2),L(1, -5)[/tex]
substitute in the formula
[tex]m=\frac{-5-2}{1-0}[/tex]
[tex]m_J_L=\frac{-7}{1}[/tex]
[tex]m_J_L=-7[/tex]
Part 4) Compare the slopes
[tex]m_J_K=-\frac{1}{3}[/tex]
[tex]m_K_L=3[/tex]
[tex]m_J_L=-7[/tex]
we have that
JK and KL are perpendicular because their slopes are opposite reciprocal
The product of their slopes is equal to -1
therefore
Triangle JKL is a right triangle because two of these slopes have a product of -1