Answer: 2m plz mark brainliest
Step-by-step explanation:
the bottom length is 8m so the top of that shape must be 8m too and 3m+3m is 6m so the missing length is 8m-6m which is 2m. you can mark brainliest by tapping on the crown when someone else answers when that happens reload the page to tap the crown on the bottom right of an answer.
