Answer:
The length of the radius is 10.30 cm
Explanation:
∵ The length of the chord = 18 cm
∵ The ⊥ distance from the center to it = 5 cm
∴ ⊥ distance bisects chord (18/2 = 9)
By using Pythagoras Theorem (⊥ distance , half chord , radius)
∴ r² = 9² + 5² = 81 + 25 = 106
∴ r = √106 = 10.30 cm