Mathematics
If the point (2, 1) is the mid-point of the line segment PQ joining the points and Q(a, b), then (a + b) is equal to: 1. 2. 3. 4.
Related Questions
A(-3, b) and B(1, b + 4) are two points. If the coordinates of the mid-point of AB are (-1, 1), then the value of b is :
-1
0
1
2
If the point R(5, 7) is the mid-point of the line segment joining the points P(3, y) and Q(x, 9), then (x + y) equals:
7
9
12
14
The coordinates of the vertices of ΔABC are respectively (-4, -2), (6, 2) and (4, 6). The centroid G of ΔABC is:
(2, 2)
(2, 3)
(3, 3)
(0, -1)
Two vertices of a ΔABC are A(-1, 4) and B(5, 2) and its centroid is (0, -3). The coordinates of C are :
(4, 3)
(4, 15)
(-4, -15)
(-15, -4)