Question

Which pair of angles must be supplementary?
*
2 1
5
4 3
O <1 and <5
<5 and <3
<4 and <5
O <4 and <1

Answer 1

Answer:The  pair of angles must be supplementary are ∠2 and ∠5.

The correct option is (B)

What is supplementary angle?

Two angles are called supplementary when their measures add up to 180 degrees.

Given that:

∠2=90 and ∠5=90

So,

∠2+∠5

=90+90

=180

Hence, angle 2 and 5 makes supplementary angles.