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PrintTeacher  Felicia Taylor 

Subject Area  Geometry Honors 

Grade Level  8th 

Week #  16th 

Unit of Instruction  4: Right Triangles and Trigonometry 

Standard(s) Taught 

MAFS.912.GSRT.2.4
Prove theorems about triangles. (Theorems include: the Pythagorean Theorem proved using triangle similarity.)
MAFS.912.G.SRT.3.8
Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.

Learning Targets and Learning Criteria 

I can:
 define geometric mean
 find measures in similar right triangles using geometric mean
 apply theorems, postulates, or definitions to prove theorems about triangles, including proving The Pythagorean Theorem using triangle similarity.
 use Special Right Triangles (30 – 60 – 90 and 45 – 45 – 90) to solve for missing side lengths
 use angle measures to estimate side lengths and vice versa
 solve right triangles by finding the measures of all sides and angles in the triangles using Pythagorean Theorem and/or trigonometric ratios and their inverses
 draw right triangles that describe real world problems and label the sides and angles with their given measures
 solve application problems involving right triangles, including angle of elevation and depression, navigation, and surveying.

Classroom Activities 

Monday (2nd Period) / Tuesday (7th & 8th Periods)
 Bellringer – Proving Theorems about Triangles – Standard MAFS.912.GSRT.2.4
 Instruction – Geometric Mean / Right Triangle Similarity – Standard MAFS.912.GSRT.2.4
 Homework – Geometric Mean Worksheets (ODD PROBLEMS ONLY) – due Thursday, November 30th for 2nd Period / due Friday, December 1st for 7th & 8th Periods
Wednesday (All Classes – Early Release Day – Short Class Period)
 Bellringer – Proving Theorems about Triangles Part 2 – Standard MAFS.912.GSRT.2.4
 Instruction – The Pythagorean Theorem and its Converse – Standards MAFS.912.GSRT.2.4, MAFS.912.GSRT.3.8
 Homework – Pythagorean Theorem and its Converse Worksheets (ODD PROBLEMS ONLY) – due Monday, December 4th for 2nd period / due Tuesday, December 5th for 7th & 8th Periods
Thursday (2nd Period) / Friday (7th & 8th Periods)
 Bellringer – Proving Theorems about Triangles Part 3 – Standard MAFS.912.GSRT.2.4
 Instruction – Special Right Triangles – Standard MAFS.912.GSRT.3.8
 Homework – Special Right Triangles Worksheets (ODD PROBLEMS ONLY) – due Wednesday, December 6th for all classes

Assignments Due 

Summative
None – However, the RETAKE – Unit 2B/3 Test is due on Tuesday, December 5th – for those who desire to retake the Unit 2B/3 test. The retake is available on MathSpace.
Formatives
Worksheets (ONLY DO THE ODD PROBLEMS)
 Geometric Mean Worksheets – due Thursday, November 30th for 2nd Period / due Friday, December 1st for 7th and 8th Periods

Additional Resources 

Please open up the Geometry Honors course on Canvas regularly to view notes, assignments and messages from teacher. Feel free to email me through Canvas for questions and comments.
