A.S.T.C

Author:Ang Wee Kiat

Here you can explore how the sign of the trigonometrical ratios change when the angles are in different quadrants. Remember the acronym "ASTC - All School Teachers Care! :)"

New Resources

Perpendicular Lines: Quick Exploration
Linear Equation Graphs: Thin Slice
挂谷问题——三尖瓣形
Right Triangle Inscribed in a Semicircle
Odd Function Explorer

Discover Resources

pre_aa_template_1_2.ggb_1M_Natasha
Greedy Pig Strategy Tester
Exploring Alternate Exterior Angles (V2)
The Doppler Effect & Sonic Boom
Triangular Pin-board

Discover Topics

Exponent
Similarity Transformation or Similarity
Combinatorics
Quadrilaterals
Linear Functions