please answer this question
Asked by mac12303190 | 1st Mar, 2010, 11:44: PM
basic theory behind this question
suppose a right triangle ABC has sides a,b and hypo c
then the area of this triangle is=[1/2][ab]
let O be the incenter. drop perpendiculars from O to the sides BC,CA and AB
Join O to A,B,C
so area of triangle ABC can be written as the sum of areas of triangles
now for the given question
let the two sides be a,b. hypo=13 given
now put these values in the formula for r and you can get the answer.
depending on the marks allotted to the question you can increase the length of the solution.
e.g. if it comes for say 6 marks, it's advisable to show the entire calculations using the theory shown above.
in any case draw the diagram as mentioned in the solution.
Answered by | 2nd Mar, 2010, 10:52: AM
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