Answer:
PQ:80
QR:160
PR:120
Step-by-step explanation:
∠
×
=
×
∠
×

×
∠
=
×
=
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2)
is a rhombus (a parallelogram with perpendicular diagonals is a rhombus)
3)
bisects
(diagonals of a rhombus bisect the angles from which they are drawn)
Answer:

Step-by-step explanation:
The equation of the curve is

To find the equation of tangent we need to differentiate this equation w.r.t x
So, differentiating we get

This would give the slope of the tangent line at any given point of which x coordinate is known. In the present case it is 
Then slope would accordingly be

= ∞
For,
, 
Equation of tangent line, in the point slope form, would be 