" 2."OABC" is a parallelogram.If "OA=a" and "OC=boldsymbol c" ,find the vector equation of the side BC."

OABC is a parallelogram. If bar(OA) = bar(a), bar(OC) = bar(c ) , find the vector equation of the side BC.

OABC is a parallelogram. If bar(OA) = bar(a),bar(OC) = bar(c ) find the vector equation of the side bar(BC) .

The points A(4, 5, 10), B(2, 3, 4) and C (1, 2,-1) are three vertices of a parallelogram ABCD. Find the vector equations of the sides AB and BC and also find the coordinates of point D.

The points A(4, 5, 10), B(2, 3, 4) and C (1, 2,-1) are three vertices of a parallelogram ABCD. Find the vector equations of the sides AB and BC and also find the coordinates of point D.

The points A(4,5,10),B(2,3,4) and C(1,2,-1) are three vertices of a parallelogram ABCD. Find the vector equations of the sides AB and BC and also find the coordinates of point D.

The points A(4, 5, 10), B(2, 3, 4) and C(1, 2, -1) are three vertices of a parallelogram ABCD. Find the vector equations of side AB and BC and also find the coordinates of point D .

The points A(4, 5, 10), B(2, 3, 4) and C(1, 2, -1) are three vertices of a parallelogram ABCD. Find the vector equations of side AB and BC and also find the coordinates of point D .

In the picture below, O is the center of the circle and OABC is a rectangle OA =8c.m OC =15cm. Find the area of the shaded portion of the circle.