JAMB - Mathematics (2019 - No. 19)
In the figure above, |CD| is the base of the triangle CDE. Find the area of the figure to the nearest whole number.
56 cm\(^2\)
24 cm\(^2\)
42 cm\(^2\)
34 cm\(^2\)
설명
Area of rectangle ABCD = length x breadth
= 7 x 4
= 28 cm\(^2\)
Area of triangle CDE = \(\frac{1}{2}\) base x height
= \(\frac{1}{2} \times 3 \times 4\)
= 6 cm\(^2\)
Area of the figure = 28 cm\(^2\) + 6 cm\(^2\)
= 34 cm\(^2\)