21. A car travels 120 km from A, then turns right and travels 50 km, and stops at B. How far is B from A?
22. Rosalie is a frontliner who used a bicycle as a form of transportation in her workplace. She usually bikes 9 kilometers to the east going to a 7-eleven branch to order her breakfast, then another 5 kilometers northward going to her work. How far is she from the starting point, which is her house?
23. A wire is anchored on a 9-meter pole. One part is attached to the top of the pole and the other is 2 meters away from the base. How long is the wire?​