The area of a regular hexagon with sides of length 12 cm

What is the value of the digit 1 in the number 13?

Type the correct answer in each box, round your answers to the nearest integer 20 25 30 in the figure, the perimeter of hexagon abcdef is approximately w units, and its area is square units

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?