Question

in a right angle triangleABC right angled at b ACequal to 21 cm and BC is equal to 15 CM then find AB length​

Answer 1

21 square - 15 square
441 - 225
Root 216

Answer 2

First square root of 21 is 441 and root of 15 is 225 then we have to subtract it now see

441-225=216

Hope you will understand