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If angle A and angle B are supplementary, which of the following is true?

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Question: If angle A and angle B are supplementary, which of the following is true?

Options:

  1. Angle A + Angle B = 90 degrees
  2. Angle A + Angle B = 180 degrees
  3. Angle A - Angle B = 180 degrees
  4. Angle A = Angle B

Correct Answer: Angle A + Angle B = 180 degrees

Solution: 

By definition, supplementary angles add up to 180 degrees.

If angle A and angle B are supplementary, which of the following is true?

Practice Questions

Q1
If angle A and angle B are supplementary, which of the following is true?
  1. Angle A + Angle B = 90 degrees
  2. Angle A + Angle B = 180 degrees
  3. Angle A - Angle B = 180 degrees
  4. Angle A = Angle B

Questions & Step-by-Step Solutions

If angle A and angle B are supplementary, which of the following is true?
  • Step 1: Understand what supplementary angles are. Supplementary angles are two angles that add up to 180 degrees.
  • Step 2: Identify angle A and angle B. These are the two angles we are talking about.
  • Step 3: Since angle A and angle B are supplementary, we can write the equation: angle A + angle B = 180 degrees.
  • Step 4: This means that if you know the measure of one angle, you can find the other by subtracting from 180 degrees.
  • Supplementary Angles – Supplementary angles are two angles whose measures add up to 180 degrees.
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