The diagram below consists of a small square, four equilateral triangles, and a large square. Find the area of the large square.
ABJelly, I believe you were referring to this box in the problem
I understand you don't know how to add an image.
https://web2.0calc.com/questions/how-to-upload-a-picture_1
I hope this link helps you.
We simply have
(1+1.5)2=(2.5)2=6.25
The area of the large square is 6.25