I have drawn a figure for the foundation of a frame with dimension 24 x 32 and diagonal.
For triangle ABD, if it's satisfy the Pythagorean theorem then ABCD will be a recatngle.
Pythagorean formula is:
a² + b² = c²
Where c is the hypotenuse and a, b are the legs of the triangle.
From triangle ABD:
AB² +BD² = AD²
24² + 32² = 40²
576 + 1024 = 1600 Simplify each sides separately.
1600 = 1600
From above result , 1600 = 1600 is true.
So, ABD is a right triangle, similarly ACD will also be right triangle.
Hence, ∠B and ∠C are right triangles.
So, ABCD is a rectangle.
Hence, the last choice is correct.
Hope this helps you!.