Cho tứ diện ABCD. Chứng minh rằng AB⊥CD, AC⊥BD, AD⊥BC khi và chỉ khi AB2 + CD2 = AC2 + BD2 = AD2 + BC2

i will pick c put check it over to be sure

step-by-step explanation:

add me on g  

mail to get the anwser

blogan.20174

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.