# Use trigonometric ratios and Pythagoras' theorem in two and three dimensions

Use trigonometric ratios and Pythagoras' theorem in two and three dimensions

 1 Triangle Tangle - Determine the size of an angle in a triangle given an algebraic expression for the relationship between the 3 angles 2 Uncovering the Plot - move objects to given coordinates, side length of triangle 3 Size Matters - move objects to given coordinates, calculate side length of triangle formed 4 Degrees of Time - angle in turn made by hours hand between 2 and 6 o'clock 5 Top Of The Tower Triangle - calculate size of angles in isosceles triangle, angle sum of a triangle 6 Ancient Angles - calculate size of base angles in isosceles triangle, angle sum of a triangle 7 ABCs 2 - angle sum of quadrilateral, degrees in revolution 8 ABCs 1 - triangle geometry, equal angles opposite equal sides 9 Tricky Triangles 4 - calculate reflex angle of equilateral triangle 10 Tricky Triangles 3 - calculate size of angles in isosceles triangle, angle sum of a triangle, reflex angles 11 Tricky Triangles 2 - calculate size of angles in isosceles triangle, angle sum of a triangle 12 Tricky Triangles 1 - calculate size of angles in isosceles triangle, angle sum of a triangle 13 Shape Up! 7 - equilateral triangle, angle sum of triangle 14 Shape Up! 4 - calculate size of angles in isosceles triangle, angle sum of a triangle 15 Shape Up! 1 - exterior angles of a triangle