Inputt lengths and angles to determine whether it is a square, rectangle, a rhombus, or parallelogram

let start = alert(
  "This is a shape detector program.\nYou will be asked to enter four sides and four angles to determine the quadrilateral."
);

let obj = {};
for (let s = 1; s <= 4; s++) {
  obj[`side${s}`] = Number(prompt(`Define length ${s}: `));
}
const { side1, side2, side3, side4 } = obj;

let obj2 = {};
for (let a = 1; a <= 4; a++) {
  obj2[`corner${a}`] = Number(prompt(`Define angle ${a}: `));
}
const { corner1, corner2, corner3, corner4 } = obj2;

//if...else if...else statement
if      (side1 === side3 &&
         side2 === side4 &&
         side1 === side4 &&
         corner2 === 90 &&
         corner4 === 90 &&
         corner1 === 90 &&
         corner3 === 90) {
         console.log("This is a square."); //Square: all sides equal, all corners 90 degrees
} 
else if (side1 === side3 && 
         side2 === side4 && 
         corner2 === 90 &&
         corner4 === 90 &&
         corner1 === 90 &&
         corner3 === 90) {
         console.log("This is a Rectangle."); //Rectangle: opposite sides equal, all corners 90 degrees.
} 
else if (side1 === side3 &&
         side2 === side4 &&
         side1 === side4 &&
         corner1 < 90 &&
         corner3 < 90 &&
         corner2 > 90 &&
         corner4 > 90) {
         console.log("This is a Rhombus."); //Rhombus: all sides equal, opposite angles equal. Two opposite corners are less than 90 degrees,the other two corners are more than 90 degrees.
} 
else if (side1 === side3 &&
         side2 === side4 &&
         corner2 > 90 &&
         corner4 > 90 &&
         corner1 < 90 &&
         corner3 < 90) {
         console.log("This is a Parallelogram."); //Parallelogram: Opposite sides equal, opposite angles equal. Two opposite corners are less than 90 degrees, the other two corners are more than 90 degrees.
} 
else    {
         console.log("The determined shape is neither a square, rhombus, rectangle or parallelogram.");
}