Question

what is the area of the regular octagon below ? if neccessary round to your answer to two decimal places http://media.apexlearning.com/Images/200711/09/8066fdb8-79fe-47a8-9396-9889ec21b4c9.gif

Answer 1

@kevinf we have the side as 15 and the length of the perpendicular from center as 18.5

Answer 2

18.1

Answer 3

Now this can be considered as a triangle
okay 18.1
area of triangle=\(\frac 1 2 \times b\times h\)
here b=15 and h=18.1
area of triangle=\(\frac 1 2 \times 15\times 18.1\)
so this octagon is made of 8 such triangles
so area of octagon= 8\(\times \)area of triangle