Question

1. are the angles in the diagram below supplementary?

yes
no

Explanation:

Step1: Define supplementary angles

Supplementary angles sum to $180^\circ$.

Step2: Calculate sum of given angles

$121^\circ + 60^\circ = 181^\circ$

Step3: Compare sum to $180^\circ$

$181^\circ
eq 180^\circ$

Answer:

No