Answer:
80 degrees i believe
Step-by-step explanation:
if supplementary angles =180 then 180-100=80
m∠QRS = 80°
We know that, sum of supplementary angles is 180°.
Given that ∠ABC and ∠QRS are supplementary, and m∠ABC = 100°.
So, m∠ABC + m∠QRS = 180°
=> 100° + m∠QRS = 180°
=> m∠QRS = 180° - 100°
=> m∠QRS = 80°
