Find the area of the regular decagon with a side measure of 4 cm. give the answer to the nearest tenth.  question 28 options: 129.4 cm2 246.2 cm2 123.1 cm2 139.8 cm2 save

C.

Step-by-step explanation:

We have been given that each side of a regular hexagon measures 4 cm. We are asked to find the area of our given hexagon.

We will use surface area of hexagon formula to solve our given problem.

Therefore, the area of our given hexagon is 123.1 squared cm and option C is the correct choice.

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.