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5.05 Isosceles and equilateral triangles

Interactive practice questions

Consider the following triangle in the figure:

A triangle is shown with all three sides labeled as 14 units in length. Each of the three internal angles of the triangle is marked as 60 degrees.

Classify the triangle. Select the three correct options.

Isosceles

A

Acute

B

Scalene

C

Equilateral

D
Easy
< 1min

Consider the diagram below.

Easy
< 1min

Consider the diagram below.

Easy
< 1min

Consider the diagram below.

Easy
< 1min
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Outcomes

GEO-G.CO.10

Prove and apply theorems about triangles.

GEO-G.SRT.5a

Use congruence and similarity criteria for triangles to solve problems algebraically and geometrically.

GEO-G.SRT.5b

Use congruence and similarity criteria for triangles to prove relationships in geometric figures.

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