# A student writes an incorrect step while checking if the sum of the measures of the two re

**Question description**

**Step 1: **m∠e + m∠f + m∠g = 180° (sum of angles of a triangle)**Step 2: **m∠h − m∠g = 90° (corresponding angles)**Step 3: **Therefore, m∠e + m∠f + m∠g = m∠g + m∠h**Step 4: **So, m∠e + m∠f = m∠h

In which step did the student first make a mistake and how can it be corrected?

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