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bludragonfly33
26.11.2019 •
Mathematics
What is pa
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Ответ:
3
Step-by-step explanation:
P is the in-center
⇒PA=PE=PD because they are in-radius of the in-circle
We know that, tangent segments drawn from a point outside the circle are always equal in length
⇒DK=EK=7.2
In right triangle PKE,
using Pythagoras' Theorem :![PK^{2}=PE^{2}+KE^{2}](/tpl/images/0392/2181/5f10a.png)
⇒![PE^{2}=PK^{2}-KE^{2}](/tpl/images/0392/2181/ef98c.png)
⇒![PE=\sqrt{PK^{2}-KE^{2} }](/tpl/images/0392/2181/e65ec.png)
⇒![PE^{2}=\sqrt{7.8^{2}-7.2^{2}} }](/tpl/images/0392/2181/36d90.png)
⇒![PE=3](/tpl/images/0392/2181/9427b.png)
Therefore,![PA=3](/tpl/images/0392/2181/fb943.png)
Ответ:
Side B'A' has a slope of 1 and is parallel to side BA.