College Math CLEP Prep Practice Exam

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What type of angle is formed when two lines intersect?

Acute
Right
Obtuse
Concave

The correct answer is: Right

When two lines intersect, four angles are formed and one of them will be a right angle. A right angle measures exactly 90 degrees and is formed by two perpendicular lines. The other options are incorrect because an acute angle is smaller than a right angle and measures less than 90 degrees, an obtuse angle is larger than a right angle and measures more than 90 degrees, and a concave angle is not formed by two intersecting lines at all. So the correct answer is "Right angle," as all the other options do not accurately describe the angle formed by two intersecting lines.