Are the himalays the highest mountains in the world?

Mount Everest:

The "Highest Altitude"

Almost everyone knows that Mount Everest is the highest mountain in the world and climbers from everywhere travel to Everest hoping to earn the distinction of climbing the "World's Highest".

The peak of Mount Everest is 8,848 meters (29,028 feet) above sea level. This high elevation gives Mount Everest the distinction of being the mountain with the highest altitude.

An altitude of 8,848 meters (29,028 feet) makes

Mount Everest Earth's highest mountain.

Mauna Kea - observatories in the Hawaiian snow

Mauna Kea has an altitude of 4,205 meters (13,796 feet) - much lower than Mount Everest. However, Mauna Kea is an island and if the distance from the bottom of the nearby ocean floor to the peak of the island is measured, then Mauna Kea is taller than Mount Everest.

Mauna Kea is over 10,000 meters tall compared to 8,848 meters for Mount Everest - making it the world's tallestmountain.

Mauna Kea rises over 10,000 meters above

the ocean floor making it taller than Everest.

Chimborazo mountain in Ecuador

Chimborazo in Ecuador has an altitude of 6,310 meters (20,703 feet) which is less than both Mount Everest and Mauna Kea. However, Chimborazo has the distinction of being the highest mountain above Earth's center.

This is because Earth is not a sphere - it is an oblate spheroid. As an oblate spheroid, Earth is widest at it's equator. Chimborazo is just one degree south of Earth's equator and at that location it is 6,384 kilometers from Earth's center or about 2 kilometers farther from Earth's center than Mount Everest.