Junior Certificate Constructions
Construction 3 Line perpendicular to a given line l, passing through a given point not on l. (VIDEO)
Construction 4 Line perpendicular to a given line l, passing through a given point on the line l. (VIDEO)
Construction 6 & 7 Division of a line segment into two or three equal segments, without measuring it. (VIDEO)
Construction 13 Right-Angled triangle, given length of hypotenuse and one other side. (VIDEO)
Leaving Certificate Constructions.
Construction 16 Circumcentre and circumcircle of a given triangle, using only straight edge and compass. (VIDEO)
Construction 17 Incentre and incircle of a given triangle, using only straight edge and compass. (VIDEO)
Construction 20 Parallelogram, given the lengths of the sides and the measure of the angles. (VIDEO)
Constructions 22 Orthocentre of a triangle (Higher Level Only) (VIDEO)