Answer:
The sum of any two supplementary angles is 180⁰. If you have been given a task to that one angle measures 120⁰ and have to find its supplement, you will compute as ⇒ 180⁰ - 120⁰ = 60⁰. So, the missing will be 60⁰.
Step-by-step explanation:
- As we know that the sum of any two supplementary angles is 180⁰.
- If we have to get the supplement, all we need is to subtract a given angle from 180.
- A straight line measure 180⁰.
- If you have been given a task to that one angle measures 120⁰ and have to find its supplement, you will compute as ⇒ 180⁰ - 120⁰ = 60⁰. So, the missing will be 60⁰.
Let us consider the m∠MON = 45⁰, as shown in figure a. As straight line measure 180⁰, and the sum of any two supplementary angles is 180⁰. So, 180⁰ - 45⁰ = 135⁰ ⇒ m∠MOL = 135⁰.
So, the supplement of m∠MON = 45⁰ is m∠MOL = 135⁰.
Keywords: supplementary angle, angle measure
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