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In triangle GHI, if angle G = 70° and angle H = 40°, what is the measure of angl

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Question: In triangle GHI, if angle G = 70° and angle H = 40°, what is the measure of angle I?

Options:

  1. 70°
  2. 60°
  3. 50°
  4. 30°

Correct Answer: 60°

Solution: 

Angle I = 180° - (70° + 40°) = 70°.

In triangle GHI, if angle G = 70° and angle H = 40°, what is the measure of angl

Practice Questions

Q1
In triangle GHI, if angle G = 70° and angle H = 40°, what is the measure of angle I?
  1. 70°
  2. 60°
  3. 50°
  4. 30°

Questions & Step-by-Step Solutions

In triangle GHI, if angle G = 70° and angle H = 40°, what is the measure of angle I?
  • Step 1: Understand that the sum of all angles in a triangle is always 180°.
  • Step 2: Identify the given angles in triangle GHI: angle G = 70° and angle H = 40°.
  • Step 3: Add the measures of angle G and angle H together: 70° + 40° = 110°.
  • Step 4: Subtract the sum of angle G and angle H from 180° to find angle I: 180° - 110° = 70°.
  • Step 5: Conclude that the measure of angle I is 70°.
  • Triangle Angle Sum Theorem – The sum of the interior angles of a triangle is always 180°.
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