A rectangle is divided into four small rectangles as shown. The areas of three of the four small rectangles are labeled in the diagram. What is the area of the remaining small rectangle?
pls solve quickly! Thanks ;)
+9481 
ab = 4 → a = 4 / b
bd = 3
cd = 5 → c = 5 / d
area of remaining rectangle = ac = \(\frac4b\cdot\frac5d=\frac{20}{bd}=\frac{20}{3}\)
+130073 Thanks, hectitctar!!!......there is a sligtly faster way of finding the missing area
Using hectictar's diagram [ along with a theorem from Euclid ]
area of ab * area of dc = area of bd * area of ac
4 * 5 = 3 * area of ac
20 = 3 * area of ac
Divide both sides by 3
20 / 3 = area of ac
