Project152: Phase 2 Solutions

To prepare for the Specialist External exam, each week Project152 will be presenting 5 new past questions for you to try.
If you stick with us and tune in every week, by the time the externals have rolled around, you will have attempted all 152 of the past questions from the QCAAs external exams.

[FinnCohen.]

For the final question, when finding the area of the triangle instead of doing the cross product can you just use the magnitude of P and Q of which you calculated in part A. This would result in 1/2*Sqrt14*2sqrt6*sin(109.1)?

[estieoosthuizen]

This is great thank you Joel. So good to be reminded of GC functionalities.

[jakeswindale]

Brilliant resource. Thankyou so much Joel

[docta]

For the area of the triangle (last question), could you just use bh/2, where b is the length of QP and h is the length of the midpoint? My GC doesn't have a cross product function :(