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Geometry 4-5 Isosceles and Equilateral Triangles
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by Matthew Richardson
| 20 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.
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VIsit this URL to create a copy of the Google Drawing and complete the item that follows: https://docs.google.com/drawings/d/15TaBfWflkEageasFgoi31Yb9Ql_t1rssKR5yFQhGa5Q/copy
1
20 pts
Solve It! The triangles of the same color in the Google Drawing you copied above are congruent. Complete the following steps.

1. Arrange the triangles to form one large triangle using the Google Drawings to drag, flip, and rotate individual triangles, but do not resize them.
2. Screenshot your final triangle and upload the image to the canvas.
2
10 pts
Solve It! Classify the large triangle you created by its sides.
Scalene
Isosceles
Equilateral
3
10 pts
Solve It! Which of these measurements represent angles in the large triangle you created?
Select all that apply.
50°
80°
95°
135°
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4
5 pts
Problem 1 Got It? Is ∠WVS congruent to ∠S ?
Yes
No
5
5 pts
Problem 1 Got It? Is segment TR congruent to segment TS ?
Yes
No
6
5 pts
Problem 1 Got It? Reasoning: Can you conclude that △RUV is isosceles?
Yes
No
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7
10 pts
Problem 2 Got It?
A
B
C
D
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8
10 pts
Problem 3 Got It?
A
B
C
D
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9
10 pts
A
B
C
D
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10
10 pts
A
B
C
D
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11
10 pts
A
B
C
D
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12
10 pts
A
B
C
D
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13
10 pts
A
B
C
D
14
10 pts
Reasoning: What is the relationship between sides and angles for each type of triangle?
a. isosceles
b. equilateral
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15
10 pts
Error Analysis: Claudia drew an isosceles triangle. She asked Sue to mark it. Explain why the marking of the diagram is incorrect.
16
5 pts
Review Lesson 2-1: Find the next two terms of the sequence.

R, W
S, S
S, M
M, T
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17
10 pts
Review Lesson 4-2: Can you conclude that the two triangles are congruent? Explain.
No, there is not enough information.
Yes, they are congruent by SSS.
Yes, they are congruent by SAS.
Yes, they are congruent by AAS.
Yes, they are congruent by ASA.
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18
10 pts
Review Lesson 4-2: Can you conclude that the two triangles are congruent? Explain
No, there is not enough information.
Yes, they are congruent by SSS.
Yes, they are congruent by SAS.
Yes, they are congruent by AAS.
Yes, they are congruent by ASA.
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19
10 pts
Use Your Vocabulary: Classify each of the triangles. Triangles may be placed in more than one category.
  • Equilateral
    Answer by dragging items here
  • Isosceles
    Answer by dragging items here
  • Right
    Answer by dragging items here
20
10 pts
Reflection: Math Success
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