High School Challenge





The ABC's of Degrees



In triangle ABC, the measure of angle A is 30 degrees, and the measure of angle B is 45 degrees. If M is the midpoint of AC, find the measure of angle MBC.


Correct Solutions:


  1. Morgan Chen. Mt. Carmel HS, San Diego, CA
  2. Yang Liu. Davis HS, Davis, CA
  3. Ing-Kye Sim. Applecross HS, Western Australia, Australia
  4. Puja Guha. American School of Kuwait, Hawalli, Kuwait
  5. Alex Lorbert. Yeshivah of Flatbush HS, Brooklyn, NY
  6. Elayne Reiss. Lake Mary HS, Lake Mary, FL
  7. Ashlea Fadem, Lake Highland Prep, Orlando, FL
  8. Tet Matsuguchi. Centennial HS, Boise, ID
  9. Kolade Apata. Benjamin E. Mays HS, Atlanta, GA
  10. Ethan Townsend. Rutland HS, Rutland, VT
  11. Sorin Ionescu. Ecole Secondaire Dorval, Quebec, Canada
  12. Kathleen Tillotson. Lyman HS, Longwood, FL
  13. Nasser Demir. American School of Kuwait, Hawalli, Kuwait
  14. Chris Toenies. Sauk Centre HS, Sauk Centre, MN
  15. Joseph Stark. Vero Beach HS, Vero Beach, FL
  16. Kevin Kendall. Johnson JHS, Melbourne, FL
  17. Jon Stuff. Maroa-Forsyth HS, Maroa, IL
  18. Mike Marler. Pocatello HS, Pocatello, ID
  19. EunSik Kim. United World College of SE Asia, Singapore
  20. Jennifer Jeffas. Walkersville HS, Walkersville, MD
  21. Jill Harris. Walkersville HS, Walkersville, MD
  22. Anthony Holland. Louisa County HS, Mineral, VA
  23. Jamel Jackson. Louisa County HS, Mineral, VA
  24. Jessica Gilbreth. Louisa County HS, Mineral, VA
  25. Brian Thomas. Louisa County HS, Mineral, VA
  26. Steve Tomasello. Louisa County HS, Mineral, VA
  27. Adam Bliss. Collins Hill HS, Suwanee, GA
  28. Dylan Leigh. Bunbury Senior HS, Bunbury, Australia
  29. Josh Hoffmanns. Merritt Island HS, Merritt Island, FL
  30. Audrey Wirtzberger. Merritt Island HS, Merritt Island, FL
  31. Matt Woodside. Merritt Island HS, Merritt Island, FL
  32. Leigh Blackwelder. Merritt Island HS, Merritt Island, FL
  33. Su Yin. Beiyi HS, Beijing,China
  34. Andy Curtis. North Hopkins HS, Madisonville, KY
  35. Justin Halbersma. Sauk Centre HS, Sauk Centre, MN
  36. Erik Lamb. Maroa-Forsyth HS, Maroa, IL
  37. Chris Barrow. Northwest MS, Greensboro, NC
  38. Ming De Lin. Fair Lawn HS, Fair Lawn, NJ
  39. Clint Martin. Cocoa HS, Cocoa, FL
  40. Wojciech Lewkowicz. Lemont HS, Lemont, IL
  41. Rick Allison. Lyman HS, Longwood, FL
  42. Anna Stachow. Lyman HS, Longwood, FL
  43. Erin Perkins. Walkersville HS, Walkersville, MD
  44. Chad McDonald. Walkersville HS, Walkersville, MD
  45. Joel Merritt. Merritt Home School, Lutz, FL
  46. Tron Harris. Louisa County HS, Mineral, VA
  47. Mike Wilson. Louisa County HS, Mineral, VA
  48. Gregory Winston. O'Neill C.V.I., Oshawa, ON, Canada
  49. David Barsic. Franklin Regional HS, Murrysville, PA
  50. Blake Hodgin. Moscow HS, Moscow, ID
  51. Jan Rapp. Beaverton HS, Beaverton, OR
  52. Kolade Apata. Benjamin E. Mays HS, Atlanta, GA
  53. Justin Lam. College Park HS, Pleasant Hill, CA
  54. Alex Wissner-Gross. Great Neck South HS, Great Neck, NY
  55. Robby Marcs. Rickards HS, Tallahassee, FL
  56. Becky Cassell. Rickards HS, Tallahassee, FL
  57. Ronald Renelick. Ipswich High School, Ipswich, MA