32. The radii of two concentrie circles are 17 cm and 8 cm. A chord of the bigger
touches the smaller circle. Find the length of that chord.
Answers
Answered by
5
Step-by-step explanation:
According to the Question,
OC = radius of smaller circle = 8 cm.
OA = radius of larger circle = 17 cm.
AB = chord of larger circle
OC ⊥ AB
∴ AC = CB
From ∆ OAC,
AC = √OA² - OC² = √17² - 8²
AC = √(17 + 8)(17 - 8)
AC = √25 × 9 = 5 × 3 = 15 cm.
∴ AB = 2AC = 30 cm.
Answered by
2
Answer:
radius of the larger circle 17 cm
so diameter is 34
length of the cord is 17-8 =9
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