Teaching Algebra with Manipulatives

80
70
60
50
40
30
Indirect Measurement
Find the height of each object. Use a calculator to find the
approximate value of the tangent of the angle.
Example:
NAME ______________________________________________ DATE ____________ PERIOD ____
Algebra Activity
(Use with Algebra 2, Lesson 13-1)
x
tan (45°) x 1.7
9
1.0 x 1.7
9
9 x 1.7
10.7 x
The flag pole is 10.7 meters
high.
45˚
1.7 m
9 m
C B C
1. 2.
x
x
30˚
20'
4'
60˚
2 m
10 m
3. Your school building ________________________________________________
4. The flag pole _______________________________________________________
5. A house close to your school _________________________________________
6. A telephone or electric pole _______________________________________ __
7. A church or business building _______________________________________
8. Another object _________________ ___________________
(name of object) (height of object)
© Glencoe/McGraw-Hill 300 Teaching Algebra with Manipulatives