Understanding Angles and Lines

Front

What does the symbol ≌ represent?

Back

Congruent

Front

In a triangle, which point is the vertex?

Back

The point where two sides meet, for example, point B in triangle ABC.

Front

Which word means the same as congruent?

Back

Same

Front

What type of angle measures exactly 180 degrees?

Back

Straight angle

Front

Identify the geometric notation for a directed line segment from point R to point S.

Back

@@ ightarrow{RS}@@ (or \overrightarrow{RS})

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is the definition of parallel lines?

Back

Lines in a plane that never meet and are always the same distance apart.

Front

What is the definition of perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees).