Here's this week's #OCRMathspuzzle!
A regular pentagon is enclosed within a rectangle, so that it just touches all four sides of the rectangle.
The area of the pentagon is 100 cm^2.
What is the area of the rectangle to 3 significant figures?
#MathsToday #UKMathsChat #Maths #puzzle #geometry #area
A regular pentagon is enclosed within a rectangle, so that it just touches all four sides of the rectangle.
The area of the pentagon is 100 cm^2.
What is the area of the rectangle to 3 significant figures?
#MathsToday #UKMathsChat #Maths #puzzle #geometry #area
Comments
20*(6 + ✓(5 - ✓5)/✓(5 + ✓5))
It's golden rectangles all the way down.