Geometry Proofs (Higher Level)
Theorem 4 : The angles in a triangle add up to 18o degrees.
Theorem 6: Each exterior angle of a triangle is equal to the sum of the interior opposites
Theorem 9: In a parallelogram, opposite sides are equal, and opposite angles are equal.
Theorem 14: (Pythagoras) In a right angled triangle, the square of the hypotenuse is equal to the sum of the squares
of the other 2 sides.
of the other 2 sides.
Theorem 19: The angle at the centre of a circle standing on a given arc is twice the angle at any point of the circle standing on the same arc.
JC HL Proofs.ppt | |
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