What number goes under the square root and how do you get the answer :)?

c = √500

Step-by-step explanation:

a rectangle has four inner angles equals to 90 degrees

so for find c we can use the Pythagorean theorem because it is an hypotenuse of a right triangle

c^2 = 10^2 + 20^2

c^2 = 100 + 400

c^2 = 500

c = √500

6 (3) - 4 + 32

hope this