Point A is 10 miles West of Point B, Point B is 30 miles North of Point C, Point C is 20 miles East of Point D. What is the d...

Answer: 
10\[\sqrt{10}\]
Point A is 10 miles West of Point B, Point B is 30 miles North of Point C, Point C is 20 miles East of Point D. What is the distance between Points A D?