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प्रश्न
Sketch proper figure and write the answer of the following question.
If X-Y-Z and l(XZ) = `3sqrt7`, l(XY) = `sqrt7`, then l(YZ) = ?
उत्तर
We have,
l(XZ) = 3`sqrt7`; l(XY) = `sqrt7`
Now,
l(XZ) = l(XY) + l(YZ) ...(X-Y-Z)
So, l(YZ) = l(XZ) − l(XY)
∴ l(YZ) = `3sqrt7 − sqrt7`
∴ l(YZ) = `2sqrt7`
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