HELP ME PLEASEEE ITS I HAVE TO DO IT FAST PLEASEE

a) x and 2x are complementary angles.

b) x = 30

Step-by-step explanation:

x + 2x = 90 (Complementary angles)

3x = 90

x = 30

its 30

Step-by-step explanation:

there are 180 degrees in that shape. the right angle is 90 degrees. leaving only 90 for both x and 2x. if you do x times 2 using 30 as x you get 60. if you add 60 to x, and we are using 30 as x you get 90. therefore adding 90 and 90 you get 180 which is the total degrees of the shape.

12m

step-by-step explanation:

square root means have of a number so have of 3 is 1.5 then multiply it by 8 and you get your answer!

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.