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Three Way Split

Take any point P inside an equilateral triangle. Draw PA, PB and PC from P perpendicular to the sides of the triangle where A, B and C are points on the sides. Prove that PA + PB + PC is a constant.

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Pareq Calc

Triangle ABC is an equilateral triangle with three parallel lines going through the vertices. Calculate the length of the sides of the triangle if the perpendicular distances between the parallel lines are 1 unit and 2 units.

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Pareq Exists

Prove that, given any three parallel lines, an equilateral triangle always exists with one vertex on each of the three lines.

Farhan's Poor Square

Stage: 4 Challenge Level: Challenge Level:1

From the measurements and the clue given find the area of the square that is not covered by the triangle and the circle. Give your answer as a formula and then calculate the area correct to two decimal places. (This problem was created by Syed from Foxford School and Community College).