Answer: -50, -25, -12, -2, 7, 10, 61
Step-by-step explanation:
Alright, so uno.
By six types of triangles, I'll assume that your teacher meant acute, right, obtuse, scalene, isosceles, and equilateral.
Some easy things to make with triangles are flags.
You could make a triangular leaf, with triangles as the stem.
Look up animals made out tangram triangles for some inspiration.
Honestly, just do whatever you wanna do.
Answer:
64.62
Step-by-step explanation:

A can’t because the 13 throws it off
I can't understand what you wanted with the second question (or if that is even a question), but the answer to the first one is 42.