Answer:
292 cm²
Step-by-step explanation:
the area = 2×(8×6 +8×7 + 6×7)
= 2×(48+56+42)
= 2×146
= 292
G is not necessarily the midpoint of EX, G could be at -3 or +9 and X could be at -9 or +15. If G and X are on the same side of E, then G is at the midpoint of EX, if they are on opposite sides, G is not the midpoint of EX.