For those that can't see the pic clearly, John has 315 pieces of square tiles, each of side 30cm long. i) find the minimum number of such tiles he should buy more of so that he can lay a large square with all the tiles

ii)Hence find the area of the large square

*btw the lvl for this is sec 1 and the topic is prime factors

nope.   happens to me as well.

-aparri

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.