function toSqrt(number) {     // 取平方根



	   return Math.sqrt(number)



	}



	function toPow (number) {     // 求平方



	   return Math.pow(number, 2)



	}



	function toAbs(number) {     // 求绝对值     



	    return Math.abs(number)



	}



	var n = readline();



	var ans ="NO";



	for(let i = 0; i < n; i++){



	   let linesX = readline().split(" ");



	   let linesY = readline().split(" ");



	   var vectorLength = [];



	   for(let i = 0; i < 4; i++) {



	        for(let j = 0; j < i; j++) {             



	            let vector = {                



	                x: linesX[j] - linesX[((j+1)%4)],                 



	                y: linesY[j] - linesY[((j+1)%4)]             



	            };



	            let newVectorLength = toSqrt(toPow(vector.x) + toPow(vector.y));



	            vectorLength.push(newVectorLength);



	        }



	   }



	   vectorLength = vectorLength.sort()



	   if(vectorLength[0] == vectorLength[3] 



	    && vectorLength[4] == vectorLength[5] 



	    && toAbs(2 * toPow(vectorLength[0]) - toPow(vectorLength[4])) <= Math.pow(1, -10)



	    ) {



	        ans ="YES"



	   }      



	   print(ans)



	}



	



	之后想到的 js比较暴力的方法 也不知道有没有优化的额