Big Ideas Math Geometry, 2014
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Big Ideas Math Geometry, 2014 View details
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Exercise 12 Page 90

What do you know about the given angle?

No.

Practice makes perfect
Let's begin by looking at ∠ DBG. It is the angle between DB and BG.

Nowhere in the diagram are we given any information about the measure of this angle. Therefore, we cannot assume that ∠ DBG is a right angle.