A circle touches all four sides of a quadrilateral PQRS. If PQ = 11 cm, QR = 12 cm and PS = 8 cm, then what is the length of RS?
Answer & explanation
Correct answer: option 1
We know that,
If a circle touches all four sides of quadrilateral PQRS then,
PQ + RS = SP + RQ
So, according to the question,
= 11 + RS = 8 + 12
= RS = 20 - 11
= RS = 9