Fill in the blanks to make the statements true.

Identical cubes are stacked in the corner of a room as shown below. The number of cubes that are not visible are _________.

Fill in the blanks to make the statements true.

is a net of a __________.

Fill in the blanks to make the statements true.
Order of rotational symmetry of is __________.

State whether the statements are True or False.

We can draw exactly one triangle whose angles are 70°, 30° and 80°.

State whether the statements are True or False.

The distance between the two parallel lines is the same everywhere.