Geometry - revision

1) 2x and 3x are 2 supplementary angles , find x and each angle . Find the complement of the first angle.

2) Find the complement of 2/5th of a right angle .

3) Find the supplement of ( x + 25 )

4) Which angle is equal to its complement ?

5) Which angle is equal to its supplement ?

6) Find the supplement of 165 and construct its supplement using a ruler and compasses only.

measurement revision

1) Define : time period; seconds pendulum ; frequency ; amplitude ; mass and weight ;one oscillation.
2) How would find the volume of a small irregular body .
3) what is friction? name some ways in which it can be an advantage .
4) how can it be reduced ?
5) How does friction take place?