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Chapter 3: Q32. (page 115)

Name or state the postulate, definition, or theorem that justifies each statement about the diagram.

If DA鈫�鈯�AB鈫�, then m鈭�DAB=90掳.

Short Answer

Expert verified

Definition of perpendicular lines is used to justify the statement.

Step by step solution

01

Step 1. Identify the angle between the given lines.

Observe that the lines DA鈫�and AB鈫� forms the angle 鈭�DAB.

02

Step 2. Determine the definition or concept that can be used.

Perpendicular Lines: Two lines which intersect each other to form right angle(90掳)are called perpendicular lines.

03

Step 3. Apply the concept.

By the definition of perpendicular lines, and intersect each other at right angles.

Therefore, m鈭�DAB=90掳.

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