What is the difference between Height and Length? Definition: Height is the measurement of something from base to top. Length is the measurement or extent of the longest side of an object. Vertical vs Horizontal: Height measures a vertical distance. Length measures a horizontal distance. One dimensional Objects:
Ages Of US Presidents. John F. Kennedy is the youngest-ever elected president, aged 43. However, Theodore Roosevelt is the youngest person to ever become president. He was 42 when he succeeded to the presidency, following the assassination of McKinley. Ronald Reagan is the oldest person ever to be elected president. He was 69.
Quick Answer. Republican President Ronald Reagan was the oldest acting U.S. president; he was 69 years old (just a few days shy of his 70th birthday) when he took office in 1981, and he served two consecutive terms, meaning he was in his 70s for the majority of his tenure as president.