Math, asked by ar0587835, 10 months ago

In the given figure, if CD = 17 m, BD= 8 m and AD=4 m, find the value of AC.​

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Answers

Answered by Agastya0606
16

Given: A triangle with CD = 17 m, BD= 8 m and AD=4 m

To find: The value of AC?

Solution:

  • Now we have given that B is right angled.
  • Using pythagoras theorem, we get:

                     BC² + BD² = DC²

                     BC² = DC² - BD²

                     BC² = 17² - 8²

                     BC² = 289 - 64

                     BC² = 225

                     BC = 15 m

  • Now again using pythagoras theorem, we get:

                     AB² + BC² = AC²

                     (AD + DB)² + BC² = AC²

                     (4+8)²  + 15² = AC²

                     AC² = 12² + 15²

                     AC² = 144 + 225

                     AC² = 369

                     AC = √369 = 19.20 m

Answer:

                So the value of AC is 19.20 m.

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