726 Area enclosed by parabola and straigh line | Centroid of Composite Area
Problem 726
Locate the centroid of the shaded area enclosed by the curve y2 = ax and the straight line shown in Fig. P-726. Hint: Observe that the curve y2 = ax relative to the y-axis is of the form y = kx2 with respect to the x-axis.
718 Square and Triangles | Centroid of Composite Area
Problem 718
Locate the centroid of the shaded area shown in Fig. P-718.
![Trapezoidal area with isosceles triangle subtracted from the bottom](http://www.mathalino.com/sites/default/files/images/718-trapezoid-minus-triangle.gif)
714 Inverted T-section | Centroid of Composite Figure
Problem 714
The dimensions of the T-section of a cast-iron beam are shown in Fig. P-714. How far is the centroid of the area above the base?
![Inverted T-section for centroid problem](http://www.mathalino.com/sites/default/files/images/714-inverted-t-beam.gif)