# Slope Triangle Rotation (VB)

Interact with the applet below for a few minutes. Then answer the questions that follow.
Since a and b represent lengths of segments, their values are non-negative! Keep this in mind as you answer the questions below.

## 1.

What is the slope of line j? Write this slope in terms of a and b.

## 2.

What is the sum of the measures of the blue acute angle and pink acute angle? Explain how you clearly know this to be true.

## 3.

What is the slope of line k in the applet above? Write this slope in terms of a and b.

## 4.

Suppose a = 4 and b = 5. What would the slope of j be? What would the slope of k be?

## 5.

Suppose a = 12 and b = 7. What would the slope of j be? What would the slope of k be?

## 6.

Suppose a = 6 and b = 1. What would the slope of j be? What would the slope of k be?

## 7.

What geometry vocabulary term (adjective, really) describes the intersection of lines j and k?

## 8.

What can you conclude about the slopes of 2 (non-vertical & non-horizontal )perpendicular lines in the coordinate plane?