Classifying Triangles

A triangular piece of wood has sides that are 8 inches, 8 inches, 7 inches long. Which of the following best describes this triangle?

• Equilateral

• Scalene

• Isosceles

• Right

• A
• B
• C
• D

• Equilateral Triangle
• Scalene Triangle
• Isosceles Triangle
• Right Triangle

How many acute angles must an acute triangle have?

• 2

• 1

• 4

• 3

Scalene Triangle

• 2 sides that are equal; 2 equal angles

• All 3 sides are equal; all angles equal 60 degrees

• 1 angle measures more than 90 degrees

• No sides are equal; no equal angles

Equilateral Triangle

• 2 sides that are equal; 2 equal angles

• No sides are equal; no equal angles

• All 3 angles measure less than 90 degrees

• All 3 sides are equal; all angles equal 60 degrees

Complete the congruence statement.

• OEG

• OGE

• EGO

• GOE

∆ABC ≅ ∆LMN. Which statement is NOT true?

• LM ≅ AB

• ∆CAB ≅ ∆NLM

• ∠C ≅ ∠N

• BC ≅ ML

Complete the congruence statement.

• CRP

• PCR

• RPC

• PRC

Use the congruency statement to answer the following: 
<F = ___

• <H

• <I

• <G

• not congruent to another angle