Copyright © University of Cambridge. All rights reserved.

'Pareq Calc' printed from http://nrich.maths.org/

Show menu

3 parallel lines + triangle

Triangle ABC is an equilateral triangle and the three lines marked with arrows in the diagram are parallel. If the perpendicular distances between the parallel lines are 1 unit and 2 units then calculate the length of the sides of the triangle. Suppose the distances between the parallel lines are a units and b units then what is the length of the sides of the triangle?