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A selection of our favourite mathematical puzzles and problems. Most are simple to explain, but the solutions require clever and unconventional thinking.
O documento é uma lista de exercícios de matemática sobre relações métricas no triângulo retângulo e o Teorema de Pitágoras para o 9o ano. A lista contém 15 exercícios com várias questões envolvendo cálculos para determinar comprimentos, áreas e outros valores usando o Teorema de Pitágoras. - Transferir em formato PDF ou ver gratuitamente online
What is the height of the red bar? My try: with respect to the picture, it seems for the green bar $\frac{h}{H}=\frac{2}{3}$. So, I think that ratio is the same for the red bar, and the height of t...
Test your math skills by finding the area of the shaded region in this challenging problem. Perfect for students studying math or teachers looking for math resources.
Good for discussion. Pupils can discuss with one another the different ways of solving the problem. Can extend the exercise, by creating own shapes with shaded areas, and finding the area of the shaded area. http://www.counton.org/resources/ks3framework/pdfs/measures.pdf
