How did the ancient Egyptians calculate true north? Choose two correct answers. They observed the movement of the stars. They observed the moon and measured the lunar calendar. They build a semicircular wall and marked the rising and setting point of a particular star. The center between these points is true north. They observed the sun and marked the lines according to the changing length of shadows.

How did the ancient Egyptians calculate true north? Choose two correct answers. They observed the movement of the stars. They observed the moon and measured the lunar calendar. They build a semicircular wall and marked the rising and setting point of a particular star. The center between these points is true north. They observed the sun and marked the lines according to the changing length of shadows.

		They observed the movement of the stars.
		They observed the moon and measured the lunar calendar.
		They build a semicircular wall and marked the rising and setting point of a particular star. The center between these points is true north.
		They observed the sun and marked the lines according to the changing length of shadows.