Geometry 4-5 Complete Lesson: Isosceles and Equilateral Triangles

Last updated almost 4 years ago

31 questions

Note from the author:

A complete formative lesson with embedded slideshow, mini lecture screencasts, checks for understanding, practice items, mixed review, and reflection. I create these assignments to supplement each lesson of Pearson's Common Core Edition Algebra 1, Algebra 2, and Geometry courses. See also mathquest.net and twitter.com/mathquestEDU.

Geometry 4-5 Complete Lesson: Isosceles and Equilateral Triangles

Geometry 4-5 Complete Lesson: Isosceles and Equilateral Triangles

Solve It! Classify the large triangle you created in the item above by its sides.

Solve It! Which of these measurements represent interior angles in the large triangle you created? Select all that apply.

Take Note: Describe the vertex angle of an isosceles triangle. You may also illustrate your description on the canvas.

Problem 1 Got It? Is ∠WVS congruent to ∠S ?

Take Note: Summarize Theorem 4-5. You may use the canvas to help illustrate your description.

Problem 2 Got It?

Take Note: Define corollary.

Take Note: Summarize The Corollary to Theorem 4-3. You may use the canvas to help illustrate your description.

Problem 3 Got It?

Reasoning: What is the relationship between sides and angles for each type of triangle?a. isoscelesb. equilateral

Error Analysis: Claudia drew an isosceles triangle. She asked Sue to mark it. Explain why the marking of the diagram is incorrect.

Review Lesson 2-1: Find the next two terms of the sequence.

Vocabulary Review: Respond to each item on the right with the correct item fron the left.

Use Your Vocabulary: Classify each of the triangles. Triangles may be placed in more than one category.

Reflection: Math Success

Solve It! Classify the large triangle you created in the item above by its sides.

Solve It! Which of these measurements represent interior angles in the large triangle you created? Select all that apply.

Take Note: Describe the vertex angle of an isosceles triangle. You may also illustrate your description on the canvas.

Take Note: Describe the base angles of an isosceles triangle. You may also illustrate your description on the canvas.

Take Note: Describe the legs of an isosceles triangle. You may also illustrate your description on the canvas.

Take Note: Describe the base of an isosceles triangle. You may also illustrate your description on the canvas.

Take Note: Summarize The Isosceles Triangle Theorem. You may use the canvas to help illustrate your description.

Take Note: Summarize The Converse of the Isosceles Triangle Theorem. You may use the canvas to help illustrate your description.

Problem 1 Got It? Is ∠WVS congruent to ∠S ?

Problem 1 Got It? Is segment TR congruent to segment TS ?

Problem 1 Got It? Reasoning: Can you conclude that △RUV is isosceles?

Take Note: Summarize Theorem 4-5. You may use the canvas to help illustrate your description.

Problem 2 Got It?

Take Note: Define corollary.

Take Note: Summarize The Corollary to Theorem 4-3. You may use the canvas to help illustrate your description.

Take Note: Summarize The Corollary to Theorem 4-4. You may use the canvas to help illustrate your description.

Problem 3 Got It?

Reasoning: What is the relationship between sides and angles for each type of triangle?a. isoscelesb. equilateral

Error Analysis: Claudia drew an isosceles triangle. She asked Sue to mark it. Explain why the marking of the diagram is incorrect.

Review Lesson 2-1: Find the next two terms of the sequence.

Review Lesson 4-2: Can you conclude that the two triangles are congruent? Explain.

Review Lesson 4-2: Can you conclude that the two triangles are congruent? Explain

Vocabulary Review: Respond to each item on the right with the correct item fron the left.

Use Your Vocabulary: Classify each of the triangles. Triangles may be placed in more than one category.

Reflection: Math Success

Take Note: Describe the base angles of an isosceles triangle. You may also illustrate your description on the canvas.

Take Note: Describe the legs of an isosceles triangle. You may also illustrate your description on the canvas.

Take Note: Describe the base of an isosceles triangle. You may also illustrate your description on the canvas.

Take Note: Summarize The Isosceles Triangle Theorem. You may use the canvas to help illustrate your description.

Take Note: Summarize The Converse of the Isosceles Triangle Theorem. You may use the canvas to help illustrate your description.

Problem 1 Got It? Is segment TR congruent to segment TS ?

Problem 1 Got It? Reasoning: Can you conclude that △RUV is isosceles?

Take Note: Summarize The Corollary to Theorem 4-4. You may use the canvas to help illustrate your description.

Review Lesson 4-2: Can you conclude that the two triangles are congruent? Explain.

Review Lesson 4-2: Can you conclude that the two triangles are congruent? Explain

Solve It! Which of these measurements represent interior angles in the large triangle you created?
Select all that apply.

Reasoning: What is the relationship between sides and angles for each type of triangle?

a. isosceles
b. equilateral

Use Your Vocabulary: Classify each of the triangles.

Triangles may be placed in more than one category.

Solve It! Which of these measurements represent interior angles in the large triangle you created?
Select all that apply.

Reasoning: What is the relationship between sides and angles for each type of triangle?

a. isosceles
b. equilateral

Use Your Vocabulary: Classify each of the triangles.

Triangles may be placed in more than one category.