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Strike441 [17]
3 years ago
7

A chord is 10cm from the centre of a circle of radius 15cm. Find the length of the chord.

Mathematics
1 answer:
almond37 [142]3 years ago
5 0

Answer: 21.44 cm

Step-by-step explanation:

Given

Radius r=15 cm

distance of chord from the center is 10 cm

From the figure, the length of the chord is AC

Applying Pythagoras

\Rightarrow AO^2=OB^2+AB^2\\\Rightarrow AB^2=15^2-10^2\\\Rightarrow AB^2=225-100=115\\\Rightarrow AB=\sqrt{115}=10.72\ cm

The length of the chord is AC=2AB=21.44\ cm

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Step-by-step explanation:

Step 1 :

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