How would you use a model to determine the approximate formula for the area of a circle with a diameter of 8 cm, and connect the model to the actual formula?

In the diagram below,abc is congruent to dec what is the value of x

Which is the scale factor proportion for the enlargement shown?

Scenario: susan wants to make 2 square flags to sell at a crafts fair. the fabric she wants to buy is 3 meters wide. she doesn't want any fabric left over. what's the least amount of fabric she should buy? question: which equation will susan solve her problem? note: let x represent the length of 1 side of the flag. options: 1) 3x^2 -2x =0 2) 2x^2 =3x 3) 2 * 2 = 2 * 2 4) 6 +2x = 2(4x)