Toss a thumbtack on a hard surface 50 times. How many times did it land with the point up? What is the approximate probability of landing up?

25% because there is 4 side causing it to be 1/4 chance

Step-by-step explanation:

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.