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Some question and their alternative answer are given. Select the correct alternative.

Altitude on the hypotenuse of a right angled triangle divides it in two parts of lengths 4 cm and 9 cm. Find the length of the altitude.

#### Options

9 cm

4 cm

6 cm

\[2\sqrt{6}\] cm

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#### Solution

We know that,

In a right angled triangle, the perpendicular segment to the hypotenuse from the opposite vertex, is the geometric mean of the segments into which the hypotenuse is divided.

\[\therefore {AD}^2 = CD \times DB\]

\[ = 4 \times 9\]

\[ = 36\]

\[ \Rightarrow AD = 6 cm\]

Hence, the correct option is 6 cm.

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