I need the length of the missing side! I will give brainliest!!

Describe the symmetry of the figure. identify lines of symmetry, if any. find the angle and the order of any rotational symmetry.

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?