Answer:
b = 40
Step-by-step explanation:
A I think I’m not 100 sure
Is that a trick question wouldn't it be 20??? I'm confused
A^2 + b^2 = c^2...a and b are the legs and c is the hypotenuse
20^2 + 21^2 = c^2
400 + 441 = c^2
841 = c^2
sqrt 841 = c
29 = c <== third straw will be 29 cm
