Lines, Segments, Rays, Angles and Triangles

Front

What is an acute triangle?

Back

An acute triangle is a triangle that has three acute angles.

Front

Define a line in geometry.

Back

A line is straight and extends in both directions forever.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

How can triangles be classified based on their angles?

Back

Triangles can be classified as acute, right, or obtuse based on their angles.

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one obtuse angle (greater than 90 degrees).

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

What is a ray in geometry?

Back

A ray is a part of a line that has a fixed starting point and extends infinitely in one direction.

Front

What is the difference between a line segment and a line?

Back

A line segment has two endpoints and is a part of a line, while a line extends infinitely in both directions.

Front

What is the definition of an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.