Question: According to the agency that considers if Los Angeles County is to be a separate metropolitan area, what is the total area in square miles?

Knowledge 1: Southern California
Traveling south on Interstate 5, the main gap to continued urbanization is Camp Pendleton. The cities and communities along Interstate 15 and Interstate 215 are so inter-related that Temecula and Murrieta have as much connection with the San Diego metropolitan area as they do with the Inland Empire. To the east, the United States Census Bureau considers the San Bernardino and Riverside County areas, Riverside-San Bernardino area as a separate metropolitan area from Los Angeles County. While many commute to L.A. and Orange Counties, there are some differences in development, as most of San Bernardino and Riverside Counties (the non-desert portions) were developed in the 1980s and 1990s. Newly developed exurbs formed in the Antelope Valley north of Los Angeles, the Victor Valley and the Coachella Valley with the Imperial Valley. Also, population growth was high in the Bakersfield-Kern County, Santa Maria and San Luis Obispo areas. [SEP] Knowledge 2: Riverside, California
Riverside is the 59th largest city in the United States, 12th largest city in California, and the largest city in California's Inland Empire metro area. According to the United States Census Bureau, the city has a total area of 81.4 square miles (210.8 km), of which 81.1 square miles (210 km) is land and 0.3 square miles (0.78 km) (0.37%) is water. The elevation of downtown Riverside is 860 feet (260 m). Hills within the city limits include Mount Rubidoux, a city landmark and tourist attraction. Riverside is surrounded by small and large mountains, some of which get a dusting of winter snow. Many residents also enjoy the many beaches of southern California. Riverside is about a 47 - mile drive to the Pacific Ocean and is close to Orange county and Los Angeles county.
Knowledge 1: Southern California
Traveling south on Interstate 5, the main gap to continued urbanization is Camp Pendleton. The cities and communities along Interstate 15 and Interstate 215 are so inter-related that Temecula and Murrieta have as much connection with the San Diego metropolitan area as they do with the Inland Empire. To the east, the United States Census Bureau considers the San Bernardino and Riverside County areas, Riverside-San Bernardino area as a separate metropolitan area from Los Angeles County. While many commute to L.A. and Orange Counties, there are some differences in development, as most of San Bernardino and Riverside Counties (the non-desert portions) were developed in the 1980s and 1990s. Newly developed exurbs formed in the Antelope Valley north of Los Angeles, the Victor Valley and the Coachella Valley with the Imperial Valley. Also, population growth was high in the Bakersfield-Kern County, Santa Maria and San Luis Obispo areas. [SEP] Knowledge 2: Roman Catholic Archdiocese of Los Angeles
Archdiocese of Los Angeles Archidioecesis Angelorum in California Arquidiócesis de Los Ángeles Location Country United States of America Territory Los Angeles, Santa Barbara, and Ventura Counties Ecclesiastical province Los Angeles Metropolitan Los Angeles, California Statistics Area 14,019 km (5,413 sq mi) Population - Total - Catholics (as of 2015) 11,599,000 4,392,000 (37.9%) Parishes 287 Information Denomination Roman Catholic Sui iuris church Latin Church Rite Roman Rite Established 1 June 1922 (As Diocese of Los Angeles - San Diego) 11 July 1936 (As Archdiocese of Los Angeles) Cathedral Cathedral of Our Lady of the Angels Patron saint Saint Vibiana, Saint Patrick, Saint Rita, Saint Emidius Secular priests 590 Current leadership Pope Francis Archbishop José Gómez Auxiliary Bishops Edward W. Clark Alexander Salazar Joseph Brennan David O'Connell Robert Barron Emeritus Bishops Roger Michael Cardinal Mahony Thomas John Curry Joseph Martin Sartoris Gerald Eugene Wilkerson Gabino Zavala Map Website www.la-archdiocese.org
Knowledge 1: Southern California
Traveling south on Interstate 5, the main gap to continued urbanization is Camp Pendleton. The cities and communities along Interstate 15 and Interstate 215 are so inter-related that Temecula and Murrieta have as much connection with the San Diego metropolitan area as they do with the Inland Empire. To the east, the United States Census Bureau considers the San Bernardino and Riverside County areas, Riverside-San Bernardino area as a separate metropolitan area from Los Angeles County. While many commute to L.A. and Orange Counties, there are some differences in development, as most of San Bernardino and Riverside Counties (the non-desert portions) were developed in the 1980s and 1990s. Newly developed exurbs formed in the Antelope Valley north of Los Angeles, the Victor Valley and the Coachella Valley with the Imperial Valley. Also, population growth was high in the Bakersfield-Kern County, Santa Maria and San Luis Obispo areas. [SEP] Knowledge 2: San Diego
The city had a population of 1,307,402 according to the 2010 census, distributed over a land area of 372.1 square miles (963.7 km2). The urban area of San Diego extends beyond the administrative city limits and had a total population of 2,956,746, making it the third-largest urban area in the state, after that of the Los Angeles metropolitan area and San Francisco metropolitan area. They, along with the Riverside–San Bernardino, form those metropolitan areas in California larger than the San Diego metropolitan area, with a total population of 3,095,313 at the 2010 census.

Answer: 17.037 square miles