Newbie---Make a diamond with specific angles

Another way:

1) Turn on Smart Guides. Draw a square and rotate 90°.

2) Drag a horizontal guide through the top anchor point. (I added a vertical one, but it's not necessary.) Be sure guides are unlocked (View menu > Guides > Unlock Guides). Select the guide.

3) Select the Rotate Tool, opt/alt-click the guide at the top anchor point, and 75° (half the 150°) in the Angle field, and click OK.

4) Select the rotated square and access the Scale Tool. Click on the top anchor point, then shift-drag the left anchor point until Smart Guides indicates an intersection with the 75° guide.

There's your diamond, which you can scale as you wish.

Peter

PS: Hello, Jacob. White yesterday, wet today.

Cheri,

One way is as follows, Smart Guides being your friends:

1) With the Polygon Tool create a polygon with 12 sides,

2) Rotate the polygon by 15 degrees,

3) Ctrl/Cmd+C+F to create a copy on top,

4) ShiftClickDrag the copy by the Anchor Point/corner just above the one in the middle of the side to snap to the opposite corresponding Anchor Point of the original,

5) Pathfinder>Intersect to just have the diamond,

6) Resize to desired size.

Cheri,

"Is there a way to do this in Adobe Illustrator?"

There is.

The best/easiest way(s) will depend on the actual (whole) shape; there are usually multiple ways.

It would help helpers help you to show (a sketch) or describe in more detail.