http://www.mathopenref.com/constructions.html
http://www.math-only-math.com/
Bài giảng toán học: http://www.wyzant.com/resources
Constructions pages on this site
Lines
- Introduction to constructions
- List of printable constructions worksheets
- Copy a line segment
- Perpendicular bisector of a line segment
- Perpendicular from a line at a point
- Perpendicular from a line through a point
- Perpendicular from endpoint of a ray
- Divide a segment into n equal parts
- Parallel line through a point (angle copy)
- Parallel line through a point (rhombus)
Angles
- Bisecting an angle
- Copy an angle
- Construct a 30° angle
- Construct a 45° angle
- Construct a 60° angle
- Construct a 90° angle (right angle)
- Constructing 75° 105° 120° 135° 150° angles and more
Triangles
- Copy a triangle
- Isosceles triangle, given base and side
- Isosceles triangle, given base and altitude
- Isosceles triangle, given leg and apex angle
- Equilateral triangle
- Triangle medians
- 30-60-90 triangle, given the hypotenuse
- Triangle, given 3 sides (sss)
- Triangle, given one side and adjacent angles (asa)
- Triangle, given two sides and included angle (sas)
- Incircle of a triangle
- Circumcircle of a triangle
Triangle Centers
Circles, Arcs and Ellipses
- Finding the center of a circle
- Circle given 3 points
- Tangent at a point on the circle
- Tangents through an external point
- Focus points of a given ellipse
Polygons
- Square given one side
- Hexagon given one side
- Hexagon inscribed in a given circle
- Pentagon inscribed in a given circle
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