In what three ways did the Chinese develop the perpetual calendar wan-nien-li? They observed the sun’s longitude and the moon’s phases. They used measurements from a sundial and a water clock. They de
In what three ways did the Chinese develop the perpetual calendar wan-nien-li?
They observed the sun’s longitude and the moon’s phases.
They used measurements from a sundial and a water clock.
They determined the dates of the two solstices in a year.
They mapped the constellations in the night sky.
They surveyed citizens about how many days there should be in a year.
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Cathy, CS.
