For the clock, the sum of the three angles marked is 360 degrees since the angle at that point forms a full circle.

For the scissors, the two angles marked are equal in value. These are called “vertically opposite angles”.

For the ironing board, the lower two angles marked are equal in value by the “vertically opposite angles” property, while the sum of the upper two angles marked is 180 degrees since the angles on the same side of a straight line add up to 180 degrees.

For the ladder, the sum of the two angles marked is 180 degrees since the angles on the same side of a straight line add up to 180 degrees.

For the bicycle, the sum of the angles marked is 360 degrees since the angle at that point forms a full circle.

For the clock, it should also be noted that all 3 angles are equal and each has a value of 120°. This is so as the hour, minute and second hand divide the circular face of the clock into 3 equal parts (each hand is equally spaced apart by four hour-divisions)

Those that add up to 180° are called supplementary angles.

The bicycle also has vertically opposite angles in addition to the angles at a point having to the sum of 360°.