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saucyboyFredo
19.07.2019 •
Mathematics
In a circle a chord 10 inches long is parallel to a tangent and bisects the radius drawn to the point of tangency. how long is the radius?
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Ответ:
keeping in mind that the point of tangency for a radius line and a tangent is alway a right-angle, since the "red" chord is parallel to the "green" tangent line outside, then the chord is cutting the "green" radius there in two equal halves at a right-angle, as you see in the picture.
we know the chord is 10 units long, so 5 + 5, since is perpendicularity with the radius will also cut the chord in two equal halves.
anyhow, all that said, we end up with triangle you see on the right-hand-side, and then we can just use the pythagorean theorem.
Ответ:
3.5
Step-by-step explanation:
Whenever you do 2.25 x 4 you get 9, then you add 7.50 and get 16.5. Afterwards, you subtract 3.5 from 20 leaving you with $3.5 dollars.