9. The side BC,CA and AB, of a triangle ABC are produced in order ,forming exterior angles ∠ACD, ∠BAE,and ∠CBF,then ∠ACD + ∠BAE + ∠CBF is equal to :
(1) 5400
(2) 3600
(3) 1800
(4) None of these
10. The point of intersection of the altitudes of a triangle is called its:
(1) incentre
(2) excentre
(3) orthocentre
(4) centroid
Note : Answers will be updated soon...........
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