/Geo_Sec._7.3

Geometry Chapter 7 - Right Triangles and Trigonometry Section 7.3 - Use Similar Right Triangles

What the student should get from this: !" Identify the altitudes of a triangle #" Use properties of altitudes of a right triangle Remember the geometric mean?

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P

y z x 10, 11, 5, 6,

4, 6, 9 14 a

b c

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P

!"#$%#&'()(*'+#$&#,%-.'/#01'23#45'!"#$%#& !"#$#%&'()#)%&$"'*+,#)(+#$*-)./+#0%12#)(+#%&'()#$"'*+#)1#)(+#(341)+".5+#/&6&/+5#)(+#(341)+".5+# &")1#)71#5+'2+")58 9(+#*+"')(#10#+$:(#*+'#&5#)(+#;;;;;;;;;;;;;;;;;#;;;;;;;;;;;;;;#10#)(+#(341)+".5+#$"/#)(+# 5+'2+")#10#)(+#(341)+".5+#)($)#&5#$/<$:+")#)1#)(+#*+'8 Example 1: solve for x.

3

6

x

Example 2 (#13): Find the value of the variable. Round decimal answers to the nearest tenth.

4

5

x

Example 3 (# 27): Find AC, then use the geometric mean to find AD, DC, and BD.

B

20

15

A

D

Example 4: determine the height of the monument...

6 ft

10 ft

Show work to get credit.

Assignment: p.453 #s 8-10 all, 14-25 all, 30. Due next class. One class period late will be 50% off. Beyond that, no credit given. Be ready for the daily quiz.

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