Question

I need immediate help right now. ​

Answer 1

$option : (c) \: 75°$

Explanation:

$we \: \: know \: \: \boxed{In \: \: a \: \: triangle \: \: the \: \: angles \: \: opposite \:\: to \: \: equal \: \: sides \: \: are \: \: equal}\\and\\\boxed{The \: \:sum \: \:of \: \:all \: \:three\: \: angles\: \: of\: \: a\: \: triangle\: \: is \: \:180°.}\\\red{\boxed{Note:\: \:The\: \: numbers \: \:marked \: \:with \: \:a \: \:red \: \:pen\: \: in\: \: the\: \: figure\: \: represent\: \: the \: \:steps.}}$