HELP ASAP!!!! SOMEONE FIND THE AREA OF THESE PLEASE!!! IM GIVING BRAINLIEST

Answer:
1: 12 km
2: 10.5 km
3: 3.5 mm
4: 12 m
5: 5 m
6: 49.5 cm
Step-by-step explanation:
To find the area of any triangle, multiply the height by the base, then divide by two.
Triangle are equal (H x B) ÷ 2