In triangles CDE and QRS below, mZD=mZR = 90°, CD QR, and CE QS.
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Where is the world’s shortest commercial runway?

The climate in the temperate zone is cold in summers and warm in winters very cold year-round very warm year-round warm in summers and cold in winters

In 2002, north korea announced that it was shutting down its nuclear facilities constructing a hydroelectric energy plant restarting nuclear weapon development changing to a free market economy