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  • 2009 April(66F) Math Question 15

    Perimeter, Area, Volume

    - Triangles, Squares, Rectangles, Circles

    Choice E
    $$\angle B=90°$$ $$\angle A+\angle B+\angle C=180°$$ $$\Rightarrow \angle A+\angle C=90°$$ $$\because \angle A\gt 43°$$ $$90-43=47$$ $$\therefore \angle C \lt 47°$$

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