## 13.2.4 The Pythagoras’ Theorem, PT3 Focus Practice

Question 8: In diagram below ABDE is a square and EDC is a straight line. The area of the square ABDE is 144 cm2. Calculate the length, in cm, of BC. Solution: BD = √144 = 12 cm BC2 = 122 + 92 = 144 + 81 = 225 BC = √225 = 15 cm … Read more