In quadrilateral ABCD, BM and DN are drawn perpendicular to AC such that BM = DN. If BR = 8cm. them BD is
A
4 cm
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B
2 cm
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C
12 cm
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D
16 cm
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Solution
The correct option is D 16 cm
ΔDNR and ΔBMR; DN = BM ∠DNR=∠BMR=90 ∠DRN=∠BRM (vertically opposite) So, by AAS criteria ΔDNR and ΔBMR are congruent DR = BR = 8 cm So, BD = 8 + 8 = 16 cm