If u luk carefully..Its an Right angled triangle..Then, Area of the Triangle=1/2*6*8 = 24 cm^2..
Now, Area of a Triangle=r * s [Where, r=In-radius and s=sum of all 3 sides/2]
=>24 = r*(6+8+10/2)
=>24= r*12, or, r=2 cm..
Thus In-center=2 cm..
Furthermore, On Right Angled Triangle..
=> R(Circum-radius)= Hypotenuse/2..
=>Perimeter = 2r + 4R..[This Formula is very helpful when r and R is given only and mentioned that the Triangle is a Right Angled one, and u need to find out the Area..After Establishing the perimeter, u can use, Area=r*s, to find out the area]
marks r there fa both qualified and non qualifided.. i checked in tat.. may be yo number is in the list of rejected ones who got zero marks.. i din check in tat..