RTSC:
We have to draw the diagonals from each of the vertices so as to form some triangles.

Finding the areas of the different triangles and summing them up gives the area of the irregular polygon.

Hatima:
Octagon

Bukswag:
I really would like to learn shapes. Though I'm not really solid at maths.

Please suggest PDF or websites

ifada123:

PDF will not teach you shape, not even all maths teachers can boost of Shape, shape is for does that can see and draw connections or relationship in things that are not obvious,
The best way to learn shape is practice,
Try and see the connection between already SOLVED shapes and the questions, ask questions on were you are not clear and know basic formula

Martinez39:
@ifada123
A = (3√(17+12√2))+(2√(22+12√2) = 29.9705627 (7 d.p.)

Martinez39:
@ifada123
A = (3√(17+12√2))+(2√(22+12√2) = 29.9705627 (7 d.p.)

RTSC:
We have to draw the diagonals from each of the vertices so as to form some triangles.

Finding the areas of the different triangles and summing them up gives the area of the irregular polygon.

ifada123:
If you have any objection or questions to my workings you can please express yourself let's clear the doubt.

Mitocyan:

This is unacceptable, how can you just rearrange the configurations of the sides of the octagon!!!!

Mitocyan:

This is unacceptable, how can you just rearrange the configurations of the sides of the octagon!!!!

ifada123:
Workings here,
Look forward to my next shape.
I remain Mr shape.

ifada123:
Solid foods belongs to matured people, at this time everyone know what eight sided polygon is called, but what, how do we interact with an irregular polygon I believe it is a problem to many,
Show your workings
What is the area of the eight sided polygon?

ifada123:

I can work it out with another method and still get same answer using the figure the way it was originally.

ifada123:
Solid foods belongs to matured people, at this time everyone know what eight sided polygon is called, but what, how do we interact with an irregular polygon I believe it is a problem to many,
Show your workings
What is the area of the eight sided polygon?

Mitocyan:

This is unacceptable, how can you just rearrange the configurations of the sides of the octagon!!!!

femi4:
This is wrong and you know it.
The 2s follow one another, same as the 3s but your sketch says otherwise

ifada123:

It is correct check my other solution,

ifada123:

Check it out
I skiped some simplification though

ifada123:

Check it out
I skiped some simplification though

ifada123:
It works that way
As far the lenghts are same and it is also inscrbed in same circle the polygon is same,

ifada123:

Check it out
I skiped some simplification though