Plz help me ( : ( : ( : () : i dont know what to say anymore

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

How many 2/5s are in 1 and 1/2 plz someone me right now

Five friends found a dollar on the ground and decided they each should get 1/5 of it. what amount of money will each friend get? $0.05 $0.20 $0.30 $0.80