I think you divide 20 and 8 ... I just took a wild guess, I'm not the best at shape/figure questions, so I'm really sorry.
Hopefully that helped! :)
2ND,5th,last i need 20 charcters so im just gonna type hdhdhdhdxjhd
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
Answer:
2/5
Step-by-step explanation:
when adding a positive to a negative, you can reverse the order so that you can remove the addition sign:
so instead of -4/5 + 6/5
you can make it 6/5 - 4/5 which equals 2/5 or .4
