Let D, E and F be the feet of altitudes from the vertices of acute -angled triangle ABC to the sides BC, AC and AB respectively. Triangle DEF is defined as the pedal triangle ABC. (R and r are circumradius and inradius of triangle of trangle ABC, respectivley) If X,Y,Z are the sides of a pedal triangle, then x + y + z is equal to

Let D, E and F be the feet of altitudes from the vertices of acute -an

1.	Let D, E and F be the feet of altitudes from the vertices of acute -angled triangle ABC to the sides BC, AC and AB respectively. Triangle DEF is defined as the pedal triangle ABC. (R and r are circumradius and inradius of triangle of trangle ABC, respectivley) If X,Y,Z are the sides of a pedal triangle, then x + y + z is equal to
Answer» `DELTAR//2` `Delta//2R` `DeltaR` NONE of these Answer :D