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DiamondSharp9860
05.07.2019 •
Mathematics
Given: △abc, ab=bc=10 cm, ac=12 cm, ak ⊥ bc cm ⊥ ab , bn ⊥ ac . find: ak, bn, cm.
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Ответ:
Since AB=Bc, triangle ABC is isosceles with base AC. Then BN is height and median drawn to the base. If BN is median and AC=12 cm, then AN=NC=6 cm.
1. By the Pythagorean theorem for triangle ABN,
2. AB and BC are legs of isosceles triangle ABC. The heights drawn to the lags of isosceles triangle are congruent, so AK=CM. Consider two right triangles AKC and AKB. By the Pythagorean theorem,
Subtract from the second equation the first one:
Then
AK=CM=9.6 cm, BN=8 cm
Ответ:
The median is 38.5
The lower quartile is 29
There is an outlier (154)
The upper quartile is 70
and
The interquartile range is 70 - 29= 41
Hope this helps u!