Question

please its urgent please​

Answer 1

AB is a straight line.

(< this symbol used for angle)

<b +130° =180° (linear pair)

<b=180°-130°

<b=50°

CD is a straight line.

<a+130° =180° (linear pair)

<a=180°-130°

<a=50°

AB is a straight line.

<a+90°+<c =180° (linear pair)

50°+90°+<c =180°

140°+<c =180°

<c= 180°-140°

<c= 40°