Molly used 1-inch cubes to build the structure shown. she left a 3 inch by 1-inch opening in both layers of the structure. what tools could you use to model the problem

Here are the answers to the ones that i could see.

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.