In ΔABC shown below, point A is at (0, 0), point B is at (x2, 0), point C is at (x1, y1), point D is at x sub 1 over 2, y sub 1 over 2, and point E is at the quantity of x sub 1 plus x sub 2 over 2, y sub 1 over 2:

How do I prove that segment DE is parallel to segment AB? 


In ΔABC shown below point A is at 0 0 point B is at x2 0 point C is at x1 y1 point D is at x sub 1 over 2 y sub 1 over 2 and point E is at the quantity of x sub class=

Respuesta :

you basically have to prove similarity, then use that to prove the two angles CDE & DAB are equal. You can prove similarity with AA, SSS, or SAS.
Hope it helps love.
-Joker7721

Answer with Step-by-step explanation:

We are given that a triangle ABC. In triangle ABC , the coordinates of A is at (0,0), Point B is at [tex](x^2,0)[/tex], Point C is at [tex](x_1,y_1)[/tex], Point D is at [tex] (\frac{x-1}{2},\frac{y-1}{2})[/tex], Point E is at [tex](\frac{x-1\frac{x-2}{2},\frac{y-1}{2})[/tex].

The coordinates of point E can be write as [tex](\frac{3x-4}{2}.\frac{y-1}{2})[/tex].

Slope formula of a line passing through two points [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex]is given by

=[tex]\frac{y_2-y_1}{x_2-x_1}[/tex].

By using slope formula of a line

Slope of line AB which passing through the points A (0,0) and B[tex](x^2,0)[/tex]

Where [tex]x_1=0,x_2=x^2,y_1=0,y_2=0[/tex]

=[tex]\frac{0-0}{x^2-0}[/tex]

Slope of line AB which passing through the points A(0,0) and B[tex](x^2,0),m_1[/tex]=0

Slope of line DE which passing through the points D[tex](\frac{x-1}{2},\frac{y-1}{2})[/tex] and E[tex](\frac{3x-4}{2},\frac{y-1}{2})[/tex]

Where[tex] x_1=\frac{x-1}{2},x_2=\frac{3x-4}{2},y_1=\frac{y-1}{2}, y_2=\frac{y-1}{2}[/tex]

=[tex]\frac{\frac{y-1}{2}-\frac{y-1}{2}}{\frac{3x-4}{2}-\frac{x-1}{2}}[/tex]

Slope of line DE,[tex]m_2=\frac{\frac{y-1-y+1}{2}}{\frac{3x-4-x+1}{2}}[/tex]

Slope of line DE,[tex]m_2=\frac{0}{\frac{2x-3}{2}}[/tex]

Slope of line DE which passing through the points D[tex](\frac{x-1}{2},\frac{y-1}{2})[/tex], and E[tex](\frac{3x-4}{2},\frac{y-1}{2})[/tex]

=0

We know that when two lines are parallel then thier slopes are equal.

[tex]m_1=m_2[/tex]

Slope of line DE = Slope of line AB

Hence, the line DE and line AB are parallel lines.