Answer:
Explanation:
To find:-
Answer:-
Let us take that, PQ = s , QS = p , QR = a and RS = b.
Here we can see that, ∆PQR and ∆PQS are right angled triangles .
Here, the value of RS would be,

Finding the value of "p" :-
In ∆PQS ,



Finding the value of "a" :-
In ∆PQR , we can use Pythagoras theorem .
- According to which, in a right angled triangle, the sum of squares of base and perpendicular is equal to the square of hypotenuse.
- Hypotenuse is the longest side of the triangle and the side opposite to 90° is hypotenuse.
So that,

where the symbols have their usual meaning.
On substituting the respective values, we have;






Hence we can find the value of b as ,




Therefore the value of RS is 7cm .