How do I find the missing angle?

He expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. if the length is fraction 2 over 3 unit and the width is fraction 1 over 3 unit, what is the perimeter of the rectangle in units? fraction 2 over 3 unit 1 unit 1fraction 2 over 3 units 2 units

Is it true that product of 3 consecutive natural numbers is always divisible by 6? justifyyour answer

What is the average rate of change for this function for the interval from x=2 to x=4 ?