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Anna11 [10]
3 years ago
13

What is the slope-intercept equation that represents a midsegment of the triangle below?

Mathematics
1 answer:
ycow [4]3 years ago
7 0

Answer:

\boxed{\boxed{y=-0.5x+1.75}}

Step-by-step explanation:

A mid-segment of a triangle is a segment connecting the midpoints of two sides of a triangle.

One mid segment is joining the mid points of EF and FD.

Mid point of ED,

=(\dfrac{1-4}{2},\dfrac{4+1}{2})

=(-1.5,2.5)

Mid point of EF,

=(\dfrac{1+2}{2},\dfrac{4-2}{2})

=(1.5,1)

Line joining (-1.5,2.5) and (1.5,1) is,

\Rightarrow \dfrac{y-y_1}{y_2-y_1}=\dfrac{x-x_1}{x_2-x_1}

\Rightarrow \dfrac{y-2.5}{1-2.5}=\dfrac{x+1.5}{1.5+1.5}

\Rightarrow \dfrac{y-2.5}{-1.5}=\dfrac{x+1.5}{3}

\Rightarrow \dfrac{y-2.5}{1}=\dfrac{x+1.5}{-2}

\Rightarrow -2(y-2.5)=x+1.5

\Rightarrow -2y+5=x+1.5

\Rightarrow -2y=x+1.5-5

\Rightarrow -2y=x-3.5

\Rightarrow y=-\dfrac{1}{2}x+\dfrac{3.5}{2}

\Rightarrow y=-0.5x+1.75

The general point slope formula is,

y=mx+c

where,

m = slope, c = y intercept.

So comparing this equation we get,

slope = -0.5

y intercept = 1.75

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