Problem+Solving

media type="youtube" key="wlMuiKCYoWs?rel=0" height="360" width="480" align="center"
 * __Problem Solving __** Here is an online tutorial to view as a class.

Open this file with the notes for today's lesson and then save the file to your laptop. Now attempt the questions below. 1. Find the value of the pronumeral in each of the following.  2. Find the value of the pronumeral in each of the following.  3.  a) Which angle is equal to angle DCE?  b) Which angle is equal to angle DEC?  c) Use the ratios of matching sides to find the value of // x // .   Now watch this tutorial from MathsOnline for more information on Similar Triangles.  Similar Triangles II   Here are some extension questions for fast finishers.   <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 150%;">4. Harley wanted to find the width of a river at this deep and dangerous spot. He waded across the river downstream and placed two flags (A and B) on the bank 20m apart at the deep spot. After crossing back again, he placed flag C directly opposite flag A. He then moved back 8m from flag C along the line made by flags A and C. He placed flag D at this point. At a point on the bank made by flags D and B, he placed flag E. He found that the distance between flags C and E was 2m. <span style="font-family: 'Comic Sans MS',cursive; font-size: 150%;"> <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 150%;">a) Which triangles made by the flags are similar? Why are they similar?  <span style="color: #008000; font-family: 'Comic Sans MS',cursive; font-size: 150%;">b) Find the width of the river? <span style="color: #000080; font-family: 'Comic Sans MS',cursive; font-size: 150%;">5. Find the values of the pronumerals in each of the following. <span style="font-family: 'Comic Sans MS',cursive; font-size: 150%;">