How do you calculate height of mount Everest?

The height of Mount Everest has been calculated using various methods over the years. Here are two common methods used to determine the height of the world's highest peak:

1. Trigonometric Survey:

This method involves measuring the angles between the summit of Mount Everest and known points at lower elevations. Surveyors use specialized equipment such as theodolites to measure these angles accurately. By using trigonometric calculations and triangulation techniques, they can calculate the height of the mountain relative to the known points.

2. GPS (Global Positioning System) Survey:

GPS technology is widely used for precise positioning and height measurements. GPS receivers receive signals from a constellation of satellites orbiting the Earth and calculate their position based on the time it takes for the signals to travel from the satellites to the receiver. By placing GPS receivers on or near the summit of Mount Everest and comparing the measurements with known reference points, surveyors can determine the exact height of the mountain above sea level.

Both methods require precise measurements, careful data processing, and corrections for factors such as atmospheric conditions and instrument errors. Over time, advancements in technology and surveying techniques have allowed for increasingly accurate measurements of Mount Everest's height.