When two lines intersect,_angeles are formed. these four angles must add 360 degree?

What does x = in this equation x+3+2x=x+5

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges

(10. in the figure, a aabc is drawn tocircumscribe a circle of radius 3 cm ,such thatthe segments bd and dc are respectively oflength 6 cm and 9 cm. find the length ofsides ab and ac.