Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Technical drawing wikipedia , lookup
Rational trigonometry wikipedia , lookup
Trigonometric functions wikipedia , lookup
Reuleaux triangle wikipedia , lookup
History of geometry wikipedia , lookup
History of trigonometry wikipedia , lookup
History of the compass wikipedia , lookup
Pythagorean theorem wikipedia , lookup
Compass-and-straightedge construction wikipedia , lookup
1 Lesson Plan #19 Date: Wednesday October 11th, 2011 Class: Geometry Topic: Proving triangles congruent by the S.S.S. postulate . Aim: How do we prove triangles congruent by the S.S.S postulate? HW #19: Page 124 Written Exercises #’s 1-8 Objectives: 1) Students will be able prove triangles congruent using the S.S.S. postulate Do Now: 1) 2) Statements PROCEDURE: Write the Aim and Do Now Get students working! Take attendance Give Back HW Collect HW Go over the Do Now Assignment: Copy the triangle shown ̅̅̅̅ . Call it ̅̅̅̅ 1) Construct a side congruent to 𝐵𝐶 𝐷𝐸 . 2) Use your compass to measure ̅̅̅̅ 𝐴𝐵 . Using that measurement put your compass point on D and draw a circle. ̅̅̅̅ . Using that measurement put your compass point on E and draw a circle. 3) Use your compass to measure 𝐴𝐶 4) Name the intersection of the circles F forming DEF. 5) Measure angles A, B, and C and compare to angles D, E, F, respectively. What do you notice? If all six corresponding parts are congruent, what can we say about the two triangles? Reasons 2 Postulate: Two triangles are congruent if the three sides of one triangle are congruent respectively to the three sides of the other triangle [s.s.s.s.s.s.]