efloyd04
22.03.2020 •
Mathematics
Suppose a chord of a circle is 16cm and is 12 cm from the center of the circle. find the radius.
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Ответ:
The radius of the circle is approximately 14.42cm
Step-by-step explanation:
If the length of the chord is 16cm and it is 12cm from the center of the circle.
it means it forms 2 right angles while dividing the center of the chord, to the center of the circle, and at right angle. Length of the adjacent then become 16/2 = 8cm
To calculate the radius which forms hypothenus of the right angle triangle, we use Pytagoras Theorem
Say
= 
+ 
, where r is the radius of the circle
r =
r = 14.4222
r ≈ 14.42
Ответ: