what theroms do you need to know (hl) :) :)

granners
theorem of pythagoras, circle theorem, parallelogram theorem, angles in a triangle add up to 180 and an exterior angle is equal to the 2 opposite interior angles

MShelly
thank you:)

themathstutor.ie
+1 to the above as regards theorem *proofs* that are examinable.
Check page 18 of the syllabus:
http://www.ncca.ie/en/Curriculum_and_Assessment/PostPrimary_Education/Project_Maths/Syllabuses_and_Assessment/JC_Maths_English_2013.pdf
Theorems: [Formal proofs are not examinable at OL. Formal proofs of theorems 4, 6, 9, 14 and 19 are examinable at HL.]
But don't forget there are 19 geometry theorems in total, plus corollaries, that you need to understand and be able to apply.
See syllabus for the list.
Eamonn  TheMathsTutor.ie

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