Question

Solve for x in each figure and order the figures according to their values of x , from least to greatest.

Answer 1

The 4 sided shape x =60

The 6 sides shape x=41

The 5 sided shape= 48

It would go the 6 sided shape, the 5 sided shape then the 4 sided shape.

Explanation:

Make equals for each shape to get x.

5 Sided shape- 100+110+2x+3x+90=540

6 Sided shape- 126+125+3x+7+130+121+2x+6=720

4 sided shape- 2x-4+64+64+2x-4=360

Answer 2

The sum of all angles in a given shape is

NumberOfCorners * 180° - 360°

so I.e. for a triangle 180°

Now you are able to calculate the sum of the missing angles in each shape.

and then set this number equal to the sum the corners.

need an example?

1st, try a shape on your own as far as you can. then comment. if you struggle