Geometry Finals Review

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

What scale factor results in a congruent image under dilation?

Back

A scale factor of 1 results in a congruent image under dilation.

Front

If two segments are tangent to a circle, what can be inferred about their lengths?

Back

The lengths of the tangent segments from a point outside the circle to the points of tangency are equal.

Front

What are complementary angles?

Back

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

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is the definition of a tangent to a circle?

Back

A tangent to a circle is a line that touches the circle at exactly one point.

Front

How do you find the length of a tangent segment from a point outside the circle?

Back

Use the Pythagorean theorem: if the radius and the distance from the center to the external point are known, the tangent length can be calculated.

Front

What is an angle bisector?

Back

An angle bisector is a ray that divides an angle into two equal parts.

Front

What is the relationship between adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

What is the sum of the interior angles of a triangle?

Back

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