octagon is a polygon with ... sides

The name of the opposite figure is ...

In any polygon number of sides does not equal to number of ...

The diagonals are perpendicular in ...

All sides are equal in length in ...

All angels are right angels in ...

The diagonals are equal in length in ...

The measure of any angle in the square =... $\degree$  

The sum of measures of the interior angles in any triangle is ... $\degree$  

In any triangle there is at least ... acute angles

A scalene triangle has a side = 4 cm and a side = 5 cm , the third side = ... cm

The isosceles triangle has ... sides equal in length

A triangle has an angle its measure = 50 $\degree$ and another angle its measure = 60 $\degree$  , the third angle = ... $\degree$   

The measure of each angle in equilateral triangle = ... $\degree$