What is the slope of the other diagonal?
Understand the Problem
The question is asking for the slope of the other diagonal of a rhombus, given one diagonal VT. To solve this, we need to calculate the coordinates of points V and T, determine the slope of that diagonal, and then use the properties of rhombuses to find the slope of the other diagonal.
Answer
The slope of the other diagonal is \( m_{2} = -\frac{1}{2} \).
Answer for screen readers
The slope of the other diagonal is ( m_{2} = -\frac{1}{2} ).
Steps to Solve
- Identify the coordinates of points V and T
From the graph, we can read the coordinates of points V and T:
- Point ( V ) is at ( (2, 2) )
- Point ( T ) is at ( (4, 6) )
- Calculate the slope of diagonal VT
The formula for the slope ( m ) between two points ( (x_1, y_1) ) and ( (x_2, y_2) ) is given by:
$$ m = \frac{y_2 - y_1}{x_2 - x_1} $$
For points ( V ) and ( T ):
- ( (x_1, y_1) = (2, 2) )
- ( (x_2, y_2) = (4, 6) )
Now plug in the values:
$$ m_{VT} = \frac{6 - 2}{4 - 2} = \frac{4}{2} = 2 $$
- Use the properties of the rhombus
In a rhombus, the diagonals bisect each other at right angles. If the slope of one diagonal is ( m_{1} ), the slope of the other diagonal ( m_{2} ) can be found using the formula:
$$ m_{1} \cdot m_{2} = -1 $$
From step 2, we know ( m_{VT} = 2 ). Now we can set up the equation:
$$ 2 \cdot m_{2} = -1 $$
- Solve for the slope of the other diagonal
Rearranging the equation gives:
$$ m_{2} = \frac{-1}{2} $$
This is the slope of the other diagonal.
The slope of the other diagonal is ( m_{2} = -\frac{1}{2} ).
More Information
The property that the diagonals of a rhombus bisect each other perpendicularly allows us to find the slope of the other diagonal easily. Each diagonal intersection forms right angles, reflecting their slopes' relationship.
Tips
- Confusing the coordinates when calculating the slope.
- Not recognizing the relationship between the slopes of intersecting diagonals.
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