Step 1: Uselewis structure guidelines to draw the lewis structure of NO₂.

Step2: Apply VSEPR notation, A X E
A=Number of central atoms
X=Number of surrounding atoms
E= Number of lone pairs on central atom

For the above molecule VSEPR notation will be AX₂E₁

Step 3: Use VSEPR table to find the shape. AX₂E has angular/bent shape. So the shape of NO₂ molecule is angular/bentl.
Download a copy of VSEPR shapes table here

Bond angle in NOCl

Bond angle in NO₂ molecule is 120º due to repulsive force of lone pair of electrons on nitrogen.The representation is shown below.

Image courtesy:wikipedia.org