matt16913
19.10.2021 •
Mathematics
The perpendicular disector of a chord xy, cut xy at n and the circle at P. If xy = 16cm and NP = 2cm calculate the radius of the circle
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Ответ:
17
Step-by-step explanation:
If the centre of the circle is O , then △OXN is a right triangle. We also know that,
XN=16/2=8
ON=r−2 ( r is the radius of the circle)
OX=r
XN2+ON2=OX2
82+(r−2)2=r2
Solving the above equation will give us
4r=68
r=17
Ответ:
The answer is just 20