## 10.2.3 Perimeter and Area, PT3 Practice

Question 7: In diagram below, AEC is a right-angled triangle with an area of 54 cm2 and BCDF is a rectangle. Calculate (a) the perimeter, in cm, of the coloured region. (b) the area, in cm2, of the coloured region. Solution: (a) Given area of △ ACE 1 2 ×AC×9=54 AC=54× 2 9 AC=12 cm Using Pythagoras’ theorem: AE= 9 2 + … Read more