Question

what two right angles to form one angle.

Answer 1

$\huge \mathbb\fcolorbox{black}{lavenderblush}{Answer}$

supplementary angle

Answer 2

$\huge \bf \color{navy}{ \underline{ \color{navy}{❥ \: Answer}}}$

180°

When two straight lines intersect each other at 90˚ or are perpendicular to each other at the intersection, they form the right angle.