Geometry Semester 1 Review

Front

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

Back

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

Front

Calculate the midpoint between the points (-1, 6) and (2, 8).

Back

(1/2, 7)

Front

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

Back

Distance = √((x2 - x1)² + (y2 - y1)²)

Front

Find the distance between the points (-1, 6) and (2, 8).

Back

3.6

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they have the same slope and never intersect.

Front

What does it mean for two lines to be perpendicular?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

Determine if the lines through (0,4) and (2,0) and (-2,3) and (-4,2) are parallel, perpendicular, or neither.

Back

Perpendicular

Front

What is the slope of a line given two points (x1, y1) and (x2, y2)?

Back

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

Front

If a line has a slope of 2, what is the slope of a line perpendicular to it?

Back

-1/2

Front

What is a reflection in the y-axis?

Back

A reflection in the y-axis flips a point (x, y) to (-x, y).