Take three non-collinear points and construct a circle which pass through them.

Two angles are given, construct an angle such that its measure is equal to the sum of two angles.

Draw two line segments $a$ and $b$ in your notebook. Construct line segments according to the given information.

$a+b$

Draw two line segments $a$ and $b$ in your notebook. Construct line segments according to the given information.

$b-a$

Draw two line segments $a$ and $b$ in your notebook. Construct line segments according to the given information.

$2b+a$

Draw two line segments $a$ and $b$ in your notebook. Construct line segments according to the given information.

$3a-b$