Triangle ABC has been rotated 90° to create triangle DEF. Using the image below, prove that perpendicular lines have opposite and reciprocal slopes.

Question

anonymous · Answer

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anonymous · Answer

can someone help me please prove that the perpendicular lines have oppsite and recipricol slopes???

anonymous · Answer

@Haseeb96 @iambatman @HourglassMage @yanee @undeadDragon26 @tanya123 @fukkedurmomhard @lacrosseplayer22

anonymous · Answer

this requires thought. I'm burnt out from trig, thank you
sorry :(

anonymous · Answer

@ObeySoph▲ @Johnbc @Whitemonsterbunny17 @Jackie12345

anonymous · Answer

Hold on give me a sec

anonymous · Answer

$$m = \frac{ y_2-y_1 }{ x_2-x_1 }$$

anonymous · Answer

Use the points of each of the triangles that fall on the line so the points of F and E to find your first slope and then the points of B and C to find your second slope and compare to see if they are reciprocals and opposite in sign.

anonymous · Answer

Your co-ordinates will be in the form (X,Y) so use the graph to find those. to plug into your formula for slope.

anonymous · Answer

i am still confused can you please just do it for me John ? @johnbc