Because one of them was discovered and mapped before the other.
No. The Colorado river forms the border between AZ and CA, and Nebraska is in the mid-west, so its east of the Colorado river.
It flows out of Colorado to join with the Green River in Utah and then fllows into Arizona and travels from west to East before turning South and forming the border with Nevada and California before entering Mexico to the Sea of Cortez.
California's eastern border and Arizona's western border.
It about 12 miles east of Blythe Calif. Inside Arizona
It is considerably East of Arizona.
Colorado is northeast of Arizona and is also east of California.
Oregon to the North, Nevada and Arizona (along the Colorado River) to the East, Mexico to the South, and the Pacific Ocean to the West.
No, it is west.
Arizona shares its Southern border with Sonora and Baja Califoria, Mexico. To the North Utah shares its southern border with Arizona, and Arizona's western border is marked by the Colorado River to form a border with California and Nevada. The western border of New Mexico is the eastern border of Arizona and Colorado and Arizona touch each other at the Four Corners Monument.
It is west of the Mississippi River.
Idaho, Arizona, Colorado, New Mexico, Wyoming, and Nevada. To the north, Idaho and Wyoming; to the east Colorado; to the south Arizona; and to the west by Nevada
the Colorado River and the Hudson river