Measure Lengths and Angles

Front

What is the formula to find the length of a line segment given two endpoints?

Back

Length = √((x2 - x1)² + (y2 - y1)²)

Front

Define a midpoint in geometry.

Back

A midpoint is a point that divides a line segment into two equal parts.

Front

If KL = 4x + 7 and LM = 5x - 4, how do you find the value of KM?

Back

Set KL + LM = KM and solve for x.

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180°.

Front

If m∠ABD = 74°, what is m∠DBC if they are supplementary?

Back

m∠DBC = 180° - m∠ABD = 106°.

Front

What does it mean for two angles to be complementary?

Back

Two angles are complementary if their sum is 90°.

Front

If KL = 3x + 2 and LM = 5x - 10, how do you find the value of x?

Back

Set KL = LM and solve for x.

Front

What is the definition of an angle?

Back

An angle is formed by two rays with a common endpoint called the vertex.

Front

What is the relationship between the angles in a linear pair?

Back

Angles in a linear pair are supplementary, meaning they add up to 180°.

Front

Define an acute angle.

Back

An acute angle is an angle that measures less than 90°.