Question

(b) If x
1
3, evaluate x3
V
(c) In the given diagram 'O' is the centre of the circle and AB is parallel to CD.
AB 24 cm and distance between the chords AB and CD is 17 cm. If the
radius of the circle is 13 cm, find the length of the chord CD.
[4]
131
M​

Answer 1

Answer:

AP = AQ , BP = PR and CR = CQ (tangents from an external point)

Perimeter of ∆ABC = AB + BR + RC + CA

= AB + BP + CQ + CA

= AP + AQ

= 2AP

∆APO is a right-angled triangle. AO2 = AP2 + PO2

132 = AP2 + 52

AP2 = 144

AP = 12

∴ Perimeter of ∆ABC = 24 cm