In the given figure, ABC is a right-angled triangle at B and EF is perpendicular on BC. If AF = 3 cm, AB =√21cm and FC = 4 cm, then EF is equal to
A
4√3cm
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B
7√34cm
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C
4√7cm
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D
4√37cm
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Solution
The correct option is D4√37cm As we know, if any two right triangles have an acute angle measure in common, the ratios of their corresponding side lengths will be equal.