How do you find the measure of HJG if you are given no measurements?

What special shape is a rhombus? What two numbers multiplied equal 40 but when you add them equal 16? How do you round 2.647 to the nearest one? What quadrilaterals has only 1 pair of parralle sides? What is 15 percent off one hundred and forty dollars? How many times larger is 1000000 than 100? What does 9x 6y equals? When chlorine water is added to colourless solution of X a dark brown solution is obtained. What is X? Which are partial products for 128 x 43? What is ABACUS and where is used nowadays? Why is imagination important in math? How do you spell a 3D rectangle? What is four fifths divided by three sixths? What occurs once in a minute twice in a moment but never in a thousand years? How do you combine same variables with different powers? What is the decimal of 25 over 100? What does 65.25 times 70 equal? What are the types of Pythagorean theorem? What is the value and place of the 7 in 4.00712? How can I find the length of sides using coordinates?