Find the perimeter of the following figure with the indicated dimensions. three-sided figure and half of a circle, half circle is 21.21mm, one side is 23.68mm, other side is 20.76mm and round your answer to the nearest hundredth.

This is a 2017 topographic map of puerto rico in the united states, and i'm sorry that people there have suffered such a disaster. i want to ask, what do the yellow dots and areas represent on this graph? and the blue area and the little blue circle, and the little blue sign that looks like a signal tower, what do they stand for?

Name the peninsula that separates the bering sea from the sea of okhotsk?

Which of the timelines above correctly shows the order of historical events on the african continent? a. one (1) b. two (2) c. three (3) d. four (4)