Consider right triangle ADEF below. E
5
40°
F
3.8
D
Which expressions represent the length of side DE?
Choose 2 answers:

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry. how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?