Answer: 1) Angle APZ is a right triangle.
2) Angle WPB is an obtuse triangle.
Explanation:
A right angle is an angle of 90° or π/2 radians which means quarter of a circle. If a ray is placed so that it bisects a line and the adjacent angles are equal, then they must be right angles.
In the figure we can see ZP is a ray Dividng AB at P and ∠ZPB=90°,then ∠APZ=∠ZPB=90°
Ab obtuse angle is an angle with measure greater than 90°.
Here we can see ∠WPB consists of ∠ZPB(=90°) and ∠ZPW ,therefore it is greater than 90°.Thus ∠WPB is an obtuse triangle.