NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 39 - 39 of 2000

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Question number: 39

» Mathematics » Lines and Angles

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In the adjoining figure, BO, CO are angle bisectors of external angles of . Then is

Triangle poly1Triangle poly1: Polygon A, B, CTriangle poly2Triangle poly2: Polygon B, O, CArc eArc e: Semicircle through J and KArc fArc f: Semicircle through L and MSegment cSegment c: Segment [A, B] of Triangle poly1Segment aSegment a: Segment [B, C] of Triangle poly1Segment bSegment b: Segment [C, A] of Triangle poly1Segment c_1Segment c_1: Segment [B, O] of Triangle poly2Segment b_1Segment b_1: Segment [O, C] of Triangle poly2Segment dSegment d: Segment [C, B] of Triangle poly2Segment gSegment g: Segment [B, P] Segment hSegment h: Segment [C, Q] Point AA = (0.2,2.08) Point AA = (0.2,2.08) Point AA = (0.2,2.08) Point BB = (-1.96, -0.94) Point BB = (-1.96, -0.94) Point BB = (-1.96, -0.94) Point CC = (2.18, -0.98) Point CC = (2.18, -0.98) Point CC = (2.18, -0.98) Point OO = (0.1, -3.1) Point OO = (0.1, -3.1) Point OO = (0.1, -3.1) Point PP = (-3.14, -2.68) Point PP = (-3.14, -2.68) Point PP = (-3.14, -2.68) Point QQ = (3.2, -2.54) Point QQ = (3.2, -2.54) Point QQ = (3.2, -2.54) 1text1 = “1”2text1_1 = “2”3text1_2 = “3”4text1_3 = “4”

Image of Triangle ABC with Another Triangle BOC in It

Choices

Choice (4)Response

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b.

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