Question 489128
400+441=841
hypotenuse=sqrt 841=29 cm..
20²+21²=hyp.²
400+441=841
hyp.=&#8730;841=29 or -29
Throwing out the negative answer, we get the length of the hypotenuse to be 29 cm. &#9786;&#9786;&#9786;&#9786;