Find the area of the triangle whose vertices are

Matching exercise

    
Match the items on the right to the items on the left.
(3, 8), (– 4, 2) and (5, 1)
(1, 0), (6, 0), (4, 3)
(2, 7), (1, 1), (10, 8)
(–2, –3), (3, 2), (–1, –8)
61/2
15/2
47/2
15