Triangle QRS has been rotated 90° to create triangle TVU. Using the image below, prove that lines RS and VU have the opposite and reciprocal slopes.

Answer:
If the line RS has been rotated 90 degrees, then VU will be perpendicular to RS and the two slopes must be opposite and reciprocal, i.e. product of the two slopes will equal -1.
As a verification, we find the locations of V and U from rotations of R & S.
(actually, the triangle had been rotated -90°, 90 ° clockwise)
Step-by-step explanation:
Slope RS, m1:
Slope VU, m2
Hence m1*m2=1*-1=-1, meaning that m1 and m2 are opposite (in sign) and are reciprocal to each other, as expected
The lines RS and VU have the opposite and reciprocal slopes because Slope of QRS is 1, where as Slope of TVU is -1
Slope of a triangle represents the angle that are formed between positve X-axis moving anticlockwise towards y-axis.
RQ=3
SQ=3
slope (Tan∅)=[tex]\frac{perpendicular}{base}[/tex]
=RQ/SQ
=3/3 =1
TanФ=45°
UT=3
VT=-3
slope (Tan∅)=[tex]\frac{perpendicular}{base}[/tex]
=UT/VT
=3/-3 =-1
TanФ=135°
Slope of QRS is 1, where as
Slope of TVU is -1
∴ RS and VU have the opposite and reciprocal slopes.
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