Blanket Stitch Characteristics:
1. Edge Finishing: Blanket stitch is often used to finish the edges of fabric, preventing fraying.
2. Even Stitches: The stitches are evenly spaced and form a uniform line along the edge of the fabric.
3. Versatile: It can be used for both functional and decorative purposes in various embroidery designs.
Steps for Blanket Stitch:
1. Step 1: Begin by inserting the needle at the edge of the fabric and pulling it through.
2. Step 2: Insert the needle again at the same spot, but keep the thread looped over the edge.
3. Step 3: Pull the needle through the fabric, creating a loop that lies along the edge.
4. Step 4: Repeat the process along the edge, ensuring the stitches are uniform in size.
In the adjoining figure, $\triangle CAB$ is a right triangle, right angled at A and $AD \perp BC$. Prove that $\triangle ADB \sim \triangle CDA$. Further, if $BC = 10$ cm and $CD = 2$ cm, find the length of AD. 