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OBC is a triangle.
OAB is a sector of a circle, centre O.
B
7 cm
35%
100°
A
25°
4 cm
C
Calculate the area of OAB.
Give your answer correct to 3 significant figures.

OBC is a triangle OAB is a sector of a circle centre O B 7 cm 35 100 A 25 4 cm C Calculate the area of OAB Give your answer correct to 3 significant figures class=

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