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## What is the length of sr ? 9 units 12 units 15 units 18 units

THe correct option is (C) 15.

Step-by-step explanation: We are given to find the length of SR in the right-angled triangle SRQ as shown in the figure.

Since RT is perpendicular to the hypotenuse SQ, so triangle RTQ and SRT are also right-angled triangles at angle RTQ and RTS respectively.

Also, RQ = 20 units and TQ = 16 units.

Using Pythagoras theorem in triangle RTQ, we have

Now, since RT is perpendicular to the hypotenuse of ΔRST, so we get

Again, using Pythagoras theorem in right-angled triangle RST, we get

Thus, the length of SR is 15 units.

Option (C) is CORRECT.

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A 11 units 13 units B 12 units 14 units C 13 units 15… | Course Hero – Different units of length and mass exist. 6. What is the main unit of the metric system? How was it measured? 7. Were the units of area and volume defined as well? 8. Do shorter units have Greek or Latin prefixes?The absolute length units are fixed and a length expressed in any of these will appear as exactly that size. Absolute length units are not recommended for use on screen, because screen sizes vary so much. However, they can be used if the output medium is known, such as for print layout.Answer: The correct option is third, i.e.,15 units. Explanation: Given: Triangle QRS and STR are right angle triangles. RQ=20 and TQ=16. Therefore the length of SR is 15 units and third option is correct.

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