Geometry Semester 1 Exam Review

Front

What is the formula to find the slope of a line through two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1)

Front

What is the midpoint formula for a line segment between points (x1, y1) and (x2, y2)?

Back

Midpoint = ((x1 + x2)/2, (y1 + y2)/2)

Front

Define Alternate Interior Angles.

Back

Angles that are on opposite sides of a transversal and inside two parallel lines.

Front

What is the distance formula between two points (x1, y1) and (x2, y2)?

Back

Distance = √((x2 - x1)² + (y2 - y1)²)

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

If AB = 10x + 3, BC = 5x + 4, and CA = 4x + 10, how do you find the length of AB when ABC is an isosceles triangle?

Back

Set AB = BC or AB = CA and solve for x, then substitute back to find AB.

Front

What is the value of the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

What is the value of the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

How do you identify Alternate Interior Angles in a diagram?

Back

Look for angles that are on opposite sides of the transversal and between the two parallel lines.

Front

What is the significance of the midpoint in geometry?

Back

The midpoint divides a line segment into two equal parts.