12. The lines x-y+1=0 and x+ky-3=0 have an angle of 60° between them. For what values of k is this true?

The following problem is based on the Parallelogram Law. In the scaled drawing, each unit corresponds to 50 mph. A small airplane travels due east at 250 mph. The wind is blowing at 50 mph in the direction due north. Using the indicated diagonal and use it to determine the speed of the airplane in miles per hour.

Complete the drawing so that the figure is reflected across a line l b line m

Suppose that the two angles are supplementary. Find expressions for the supplements, using the expressions provided in Exercise 28, parts a to c. For two complementary angles, find an expression for the measure of the second angle if the measure of first is: a x b (3x12) c (2x+5v)

For the 30-60-90 triangle shown, suppose that XZ=a. Find: a YZ b XY

If x ¡s positive and y is negative, then the point (x , y) is in Quadrant ____________.

Given: A line m and a point T not on m Suppose that you do the following: i Construct a perpendicular line r from T to line m. ii Construct a line s perpendicular to line r at point T. What is the relationship between lines s and m?