Notes

Supports Common Core Mathematics Standard CCSS 4.G.A.2

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Classifying Triangles (Grade 4)

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Name:			Date:

Classifying Triangles

What kind of triangle is shown?
Scalene Triangle v1

Acute
Obtuse
Right

What kind of triangle is shown?
Right Triangle v2

Acute
Obtuse
Right

The angle measures of a triangle are [math]30deg, 60deg, 90deg[/math]. Which of the following best classifies the triangle?

Acute
Obtuse
Right

The angle measures of a triangle are [math]85deg, 38deg, 57deg[/math]. What kind of triangle is it?

Acute
Obtuse
Right

Based on side length, which of the following best classifies the triangle?
Equilateral Triangle v2

Scalene
Isosceles
Equilateral

Based on side length, which of the following best classifies the triangle?
Scalene Triangle v3

Scalene
Isosceles
Equilateral

The sides of a triangle measure 6 m, 7 m, and 4 m. Which type of triangle is described?

Scalene
Isosceles
Equilateral

The sides of a triangle measure 3 cm, 2 cm, and 3 cm. Which type of triangle is described?

Scalene
Isosceles
Equilateral

Elijah cuts out a triangle from a piece of cardboard as shown. Which of the following best describes Elijah's triangle?
Obtuse Triangle v3

Acute and scalene
Obtuse and scalene
Acute and isosceles
Obtuse and isosceles

10.

Giselle constructs the triangle shown using a compass and straight edge. Two of the sides measure the same length and all of the angles measure less than [math]90deg[/math]. Which of the following best describes Giselle's triangle?
Isosceles Triangle v3