Unit 3:  Triangles & More Triangles

Time Frame:  7 Weeks

 

Math > Geometry > Unit 3

 

Unit Description

Triangles are rigid figures, making them useful for structure and design Their properties of congruence have a long history of usefulness dating from ancient Egypt to our modern, technological society.

 

Enduring Understandings

·         Triangles are fundamental aesthetic, structural elements that are useful in many disciplines such as art, architecture, and engineering.

 

 

Essential Questions

·         How can classifying triangles identify their special characteristics?

·         What special relationships occur between congruent triangles and similar triangles?

·         What special properties exist in a right triangle that makes it unique?

·         How can special segments of a triangle be used to solve real-world problems?

·         How can points of concurrency be used in real- world situations?

GLEs: 1, 2, 3, 4, 8, 9, 10, 11, 12, 17, 18, 19

 

Students will know…

·         the different types of triangles: acute, equiangular, equilateral, isosceles, obtuse, right,       scalene,.

·         the different parts of a triangle: altitude, midsegment, base angle, vertex angle, base, legs, hypotenuse, remote interior angles, exterior angles.

·         the different segments of a triangle: perpendicular bisector, angle bisector, median, points of concurrency.

·         how to prove triangles  congruent by HL, ASA, AAS,SAS, CPCTC.

·         the Pythagorean Theorem, Pythagorean Triples,      special right triangles, triangle angle sum.

·         Trigonometric Ratios: angles of elevation and depressions.

·         review:  algebra,  constructions, distance formula, midpoint formula, dilations, Informal transformation.

·         similar triangles: ratio geometric mean, proportion.

·         fractals, point matrices, polar grid. 

 

Students will be able to…

·         Determine if segments form a triangle.

·         Apply properties of congruent and similar triangles.

·         Compare sizes and analyze properties of triangles.

 

Assessments

·       Performance Task: Comparison of Lots

·       Performance Task Rubric

·       3.1.1 Test

·       3.1.3 Test

·       3.1.1 – 3.1.3 Test

·       3.2.1 – 3.2.3 Test

·       3.3.3 Test

·       3.3.1 – 3.3.4 Test

·       3.3.1 – 3.3.4 Test (2)

·       3.3.4 Trig Ratio Test

·       3.3.4 Trig Ratio Make-up