Draw an isosceles triangle by taking any length for one side.

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.

$3a-b$

With the help of a protractor and a ruler draw the following angles:

$15°, 45°, 105° \& 75°$

Three line segments of fixed measure $r, s \& t$ are given.

Is it possible to construct a triangle using these line segments? If yes then draw a triangle.

Three line segments of fixed measure $r, s \& t$ are given.

Is it possible to construct a triangle using $s, t \& r+t$?