There's no city there. That point is in the Atlantic Ocean, about 25 miles west-southwest of the center of Capetown, SA.
Call the length of the shorter leg s. Then, from the Pythagorean theorem, s2 + (s + 17)2 = 252. Expanding the binomial results in: s2 + s2 + 34s + 172 = 252, or 2s2 + 34s + 289= 625, or s2 + 17s - 168 = 0. This can be factored into: (s + 24)(s - 7) = 0, which is true when s = -24 or 7. Only the latter answer makes sense for a physical triangle; therefore, the shorter leg of this triangle is 7 cm long.
Mexico City
There is not a standard lot size for a city lot. Each city will have their own specific lot sizes that must be abided to.
Go ask at the stores. The price may vary from city to city.
Buenos Aires
Naperville
Buenos Aires
Naperville
34s , 19e
34s , 19e
rio
lima
Cape
A little off Cape Town
A little off Cape town
Acapulco, Mexico