Here are sketches of four triangles. In each triangle the longest side is exactly 1 cm 1 cm 1 cm the other length is given to 2 decimal places. 0.84 cm Work out the value 57° 57° of x. 0.63 cm Х Give your answer to 1 decimal place. 57° 4 cm X = T 1 cm 1 cm 0.87 cm 57° 57° 0.54 cm
If we look at the top left triangle and the triangle with x, we notice that they are similar (since they have a 57° and a right angle). This means that 4 / 1 = x / 0.84, which means that x = 3.4.
