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Ejection Fraction: Normal Range, Low Range, and Treatment Nov 9, 2021 · Ejection fraction is a measurement doctors use to calculate the percentage of blood that leaves your heart each time it contracts. As your heart beats, it pumps (ejects) blood into your body from... Terms & labels in geometry (video) | Khan Academy Now, notice, a line never ends. You can keep going in either direction. A line segment does end, it has endpoints, a line does not. And actually, a line segment can sometimes be called just a segment. And so you would specify line EF, you would specify line EF with these arrows just like that.
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