Explanation:
A1= area of the rectangle
A1= 4yd • 10yd
A1= 40 square yd
A2= area of the part of the circular section
A2= 180°• pi • 4 square yd/360°
A2= 180° • 16yd • pi/ 360°
A2= 16yd•pi/2
A2= 8yd•pi
A2= 25,12yd
A= areo of rhe shaded portion
A= A1-A2
A= 40yd-25,12yd
A= 14,88yd