In the diagram shown, is the mid-point of . The line bisects and intersects at . The line is parallel to and intersects at . The length of is 12 and the length of is 1. The angle is 120°.
What is the length of ?
Select one option, then click Submit.
2
3
3.5
4
5
Select an option, then submit.
Sign in or create an account to reveal answers, view the solution, and save your progress. Create a free account to unlock practice and keep track of your work.
Senior Mathematical Challenge 2020 (2020)
One puzzle per day. Cryptarithm, Magic Square, Summit. No sign-up required to play.
Play daily puzzle →Interactive problems and curated lessons—water pouring, magic squares, knight's tour, and more.
Browse library →See how you rank. Top solvers by problems solved correctly. Sign in to climb the ranks.
View leaderboard →Senior Mathematical Challenge 2020 (2020)