Standards and Benchmarks Covered in this Lesson
II,3,1: Select and
use appropriate tools; make accurate measurements using both metric and common units, and measure angles in degrees and radians.
II,3,5: Use proportional
reasoning and indirect measurements including applications of trigonometric ratios, to measure inaccessible distances and
to determine derived measures such as density.
Anticipatory Set: Class discussion on hiking. Work in concepts of height above sea level and percent of oxygen in the air.
Objectives: -After measuring the length of the sides
of various triangles, students will be taught how to use the Pythagorean Theorem. Students
will then be able to find the third side of a right triangle given the lengths of two sides.
-After completing the investigation, students will also be able to find the length of
the side of a triangle given an angle measure and the length of one of the sides of a triangle.
Students will begin by measuring the length of the
sides of multiple triangles. As a class we will develop a relationship between
the legs of the triangle and the hypotenuse (Pythagorean Theorem). Students will
Develop the math
Do a couple examples
Let students begin working
on the investigation
What do we need to know
before we use the Pythagorean Theorem?
Is there anything else
we can do to find the lengths of the sides of a triangle?
What do we do with that
Soh Cah Toa thing we learned? When do we use that?