The perimeter of a shape is its length+width+length+width, or 2L+2W :).
So, in order to find the perimeter of Teresa's math book, she can add 2(28)+2(21).
Hope I helped! :)
17. Yes!! SAS theorem
18. Yes !! SSS theorem
19. Yes !! SSS theorem
20. I don’t think so
Answer:
the answer is weenie I THINK i coudl be wrong tho
Step-by-step explanation:
:)
Answer:
banana
Step-by-step explanation: