2. Calculate the size of each lettered angle, giving a reason in each case.
(a)
(b)
165°
128°
950
97°
х​

a) w = 98°

b) x = 137°

Explanation:

The reason is that they are angles at a point

Which means they are equal to 360°.

Example;

a) 165° + 97° + w = 360°

262° + w = 360°

You then group like terms

w = 360° - 262°

w = 98°

Note: The reason is the same for b)

These acts all helped the countries form new states. These acts all helped to move frontiers further westward.

Explanation: