Question

For what value of X is ABCD a rectangle ? explain your answer

Answer 1

10

Explanation:

If ABCD is a rectangle, then AB=CD and AC=BD.

• AC=BD, so x+6=2x-4
• Subtract, -x+6=-4
• Subtract, -x=-10
• Make positive, x=10

Check work:

• 10+6=2(10)-4
• 10+6=20-4
• 16=16