Use the 2D sketch search [2D Sketch search] to draw the side view of the desired angle.

At the best for this, use the pencil with strength 16.

Tip You can draw a straight line when pressing the shift key.

Click Apply and search.

-> The results are still relatively unspecific.

Also use Advanced search for geometric features.

The Geometric features dialog area opens.

Select Size and enter >= 90 under Largest dimension [Major Dimension].

Note When specifying the size, all 6 or only 1 of the options can be used.

Tip May be just stating one property can be more expedient than many.

Click Apply and search.

-> Now the search results are closer to the searched part. There is both a round hole and a long hole variant.

If there are a large number of hits, it may be useful to restrict further. You have the option of specifying a hole [Hole] or slotted hole [Slotted Hole] under Geometric features.

Open the dialog area anew by clicking on the respective icon in the search bar.

For example, select Hole and enter the desired characteristic values.

Tip Using "=" you can search for exact values. However, sometimes it is better to use "greater equal", "from - to", etc. in order not to lose important hits.

Click Apply and search.

-> Now an exactly fitting angle is found under the first search results.

Open the part in table and 3D view.

For example, to check, use Measuring grid and Measuring tool [Measure functions].

If necessary, also check the results section under Technical views.