As far as I remember, a triangle equals 180 degrees. 31+35=66. 180-66=114. 114/38=3. So b=3.
the correct conjunction is "which"
If your school is using the Scripps National Spelling Bee program, (which most schools in America do), try going on their website. All the practice words are on there. Go to spellingbee.com. Also, you can take those words and put them on Quizlet and make your own flashcards. Hope this helped!