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If one angle of a triangle is 50 degrees and another is 60 degrees, what is the

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Question: If one angle of a triangle is 50 degrees and another is 60 degrees, what is the measure of the third angle?

Options:

  1. 70 degrees
  2. 80 degrees
  3. 90 degrees
  4. 100 degrees

Correct Answer: 70 degrees

Solution: 

The third angle can be found by subtracting the sum of the other two angles from 180 degrees: 180 - (50 + 60) = 70 degrees.

If one angle of a triangle is 50 degrees and another is 60 degrees, what is the

Practice Questions

Q1
If one angle of a triangle is 50 degrees and another is 60 degrees, what is the measure of the third angle?
  1. 70 degrees
  2. 80 degrees
  3. 90 degrees
  4. 100 degrees

Questions & Step-by-Step Solutions

If one angle of a triangle is 50 degrees and another is 60 degrees, what is the measure of the third angle?
  • Step 1: Understand that the sum of all angles in a triangle is always 180 degrees.
  • Step 2: Identify the two given angles: one is 50 degrees and the other is 60 degrees.
  • Step 3: Add the two given angles together: 50 + 60 = 110 degrees.
  • Step 4: Subtract the sum of the two angles from 180 degrees to find the third angle: 180 - 110 = 70 degrees.
  • Step 5: Conclude that the measure of the third angle is 70 degrees.
  • Triangle Angle Sum Theorem – The sum of the interior angles of a triangle is always 180 degrees.
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