What is the area of triangle GHJ?5 square units6 square units7 square units12 square units

1) Formula:

area of a triangle = base * height / 2

2) data:

base = segment HG = 4 - 1 = 3

height = segment JH = 5 - 1 = 4

3) calculations:

area = 3 * 4 / 2 = 12 / 2 = 6

Answer: 6 square units.