We thought that a pyramid would be a good thing to do. We thought that a person that didn’t have anything but 2 sides would be a good idea. the answer is 6.54 I think the result is right because I measured it and checked the answer to make sure it was right

Tina has to make a model pyramid for a project. The problem is, she forgot an angle. Luckily, she remembers two of them. However, she has no idea what to do. She already made one side of the pyramid with somewhat expensive materials, so she can’t just remake it. She also doesn’t have a ruler anymore, so she can’t measure it either. That’s why you’re here to help her. According to her the base of the triangle is two and a half inches. and the hypotenuse of the triangle is seven inches. what is the last angle which makes the height of the pyramid.