Angola is 3,431 times larger than Las Vegas.
Area: 1,246,700 km2 World Factbook
Population: 19,088,106 (July 2014) World Factbook
Angola, officially the Republic of Angola, is a country in Southern Africa bordered by Namibia on the south, the Democratic Republic of the Congo on the north, and Zambia on the east; its west coast is on the Atlantic Ocean and Luanda is its capital city. Wikipedia
Area: 363 km2 calculated
Las Vegas, officially the City of Las Vegas and often known as simply Vegas, is the most populous city in the state of Nevada and the county seat of Clark County. Wikipedia