Lines, Angles, and Triangles Review

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex). It is measured in degrees.

Front

What is a line segment?

Back

A line segment is a part of a line that is bounded by two distinct endpoints.

Front

What is a ray?

Back

A ray is a part of a line that starts at a point and extends infinitely in one direction.

Front

What is a point in geometry?

Back

A point is a precise location or position in space, represented by a dot and has no size.

Front

What is the sum of angles in a triangle?

Back

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

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle in which all three sides are of different lengths.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all angles are 60 degrees.

Front

If angle ∠ABD is 67°, what is the measure of angle ∠DBC if they are supplementary?

Back

Angle ∠DBC is 113° because supplementary angles add up to 180°.

Front

What is a complementary angle?

Back

Complementary angles are two angles whose measures add up to 90 degrees.