Question

<1 and <2 are complementary angles <2 and <3 are supplementary angles. If <1 = 45°, then <3 measures (a) 145° (b) 135° (c) 45° (d) 150°

Answer 1

<1+ <2=90
45+<2=90
<2=45
now,
<2+<3=180
45+<3=180
<3=180-45
<3=135°