Common Core: 4th Grade Math : Classify Two-Dimensional Figures: CCSS.Math.Content.4.G.A.2

Study concepts, example questions & explanations for Common Core: 4th Grade Math

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Example Questions

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Example Question #1 : Geometry

The triangle below can be classified as what type of triangle? 

Screen shot 2015 12 10 at 11.03.15 am

Possible Answers:

Equilateral triangle

Isosceles triangle

Scalene triangle

Right triangle 

Correct answer:

Scalene triangle

Explanation:

This triangle is a scalene triangle because all of the side lengths are different lengths.

This is not an equilateral triangle because an equilateral triangle has to have all sides equal in length. 

This is not an isosceles triangle because an isosceles triangle has two equal sides. 

This is not a right triangle because a right triangle has to have a right angle, an angle that measures 

Example Question #2 : Geometry

The triangle below can be classified as what type of triangle? 

Screen shot 2015 12 10 at 11.03.01 am

Possible Answers:

Equilateral triangle

Scalene triangle

Right triangle

Isosceles triangle 

Correct answer:

Scalene triangle

Explanation:

This triangle is a scalene triangle because all of the side lengths are different lengths.

This is not an equilateral triangle because an equilateral triangle has to have all sides equal in length. 

This is not an isosceles triangle because an isosceles triangle has two equal sides. 

This is not a right triangle because a right triangle has to have a right angle, an angle that measures 

Example Question #3 : Geometry

The triangle below can be classified as what type of triangle? 

Screen shot 2015 12 10 at 11.00.31 am

Possible Answers:

Isosceles triangle

Right triangle 

Equilateral triangle 

Scalene triangle

Correct answer:

Isosceles triangle

Explanation:

This is an isosceles triangle because an isosceles triangle has two equal sides. 

This triangle is a not scalene triangle because a scalene triangle has side lengths of all different lengths.

This is not an equilateral triangle because an equilateral triangle has to have all sides equal in length. 

This is not a right triangle because a right triangle has to have a right angle, an angle that measures 

Example Question #4 : Geometry

The triangle below can be classified as what type of triangle? 

Screen shot 2015 12 10 at 11.01.52 am

Possible Answers:

Isosceles triangle

Right triangle

Scalene triangle 

Equilateral triangle

Correct answer:

Isosceles triangle

Explanation:

This is an isosceles triangle because an isosceles triangle has two equal sides. 

This triangle is a not scalene triangle because a scalene triangle has side lengths of all different lengths.

This is not an equilateral triangle because an equilateral triangle has to have all sides equal in length. 

This is not a right triangle because a right triangle has to have a right angle, an angle that measures 

Example Question #5 : Geometry

The triangle below can be classified as what type of triangle? 

Screen shot 2015 12 10 at 10.58.14 am

Possible Answers:

Equilateral triangle 

Isosceles triangle

Scalene triangle

Right triangle 

Correct answer:

Equilateral triangle 

Explanation:

This is an equilateral triangle because the sides are all equal, and an equilateral triangle has to have all sides equal in length. 

This triangle is not a scalene triangle because all of the side lengths are not different lengths.

This is not an isosceles triangle because an isosceles triangle has only two equal sides. 

This is not a right triangle because a right triangle has to have a right angle, an angle that measures 

Example Question #6 : Geometry

The triangle below can be classified as what type of triangle? 

Screen shot 2015 12 10 at 10.57.07 am

Possible Answers:

Right triangle 

Isosceles triangle 

Equilateral triangle

Scalene triangle 

Correct answer:

Equilateral triangle

Explanation:

This is an equilateral triangle because the sides are all equal, and an equilateral triangle has to have all sides equal in length. 

This triangle is not a scalene triangle because all of the side lengths are not different lengths.

This is not an isosceles triangle because an isosceles triangle has only two equal sides. 

This is not a right triangle because a right triangle has to have a right angle, an angle that measures 

Example Question #7 : Geometry

The triangle below can be classified as what type of triangle? 

Screen shot 2015 12 10 at 10.52.24 am

Possible Answers:

Equalaterial triangle

Right triangle

Isosceles triangle

Correct answer:

Right triangle

Explanation:

This is a right triangle because a right triangle has to have a right angle, an angle that measures . The angle on the top right is a  angle. 

This is not an equilateral triangle because an equilateral triangle has to have all sides equal in length, and no right angles. 

This is not an isosceles triangle because an isosceles triangle has two equal sides. 

 

Example Question #1 : Classify Two Dimensional Figures: Ccss.Math.Content.4.G.A.2

The triangle below can be classified as what type of triangle? 

Screen shot 2015 12 10 at 10.52.09 am

 

Possible Answers:

Equilateral triangle 

Isosceles triangle

Right triangle

Correct answer:

Right triangle

Explanation:

This is a right triangle because a right triangle has to have a right angle, an angle that measures . The angle on the top left is a  angle. 

This is not an equilateral triangle because an equilateral triangle has to have all sides equal in length, and no right angles. 

This is not an isosceles triangle because an isosceles triangle has two equal sides. 

 

Example Question #9 : Geometry

The triangle below can be classified as what type of triangle? 

Screen shot 2015 12 10 at 10.52.34 am

Possible Answers:

Right triangle 

Equilateral triangle 

Isosceles triangle 

Correct answer:

Right triangle 

Explanation:

This is a right triangle because a right triangle has to have a right angle, an angle that measures . The angle on the far right is a  angle. 

This is not an equilateral triangle because an equilateral triangle has to have all sides equal in length, and no right angles. 

This is not an isosceles triangle because an isosceles triangle has two equal sides. 

 

Example Question #10 : Geometry

The triangle below can be classified as what type of triangle? 

 

Screen shot 2015 12 10 at 10.51.55 am

Possible Answers:

Isosceles triangle 

Equilateral triangle 

Right triangle 

Correct answer:

Right triangle 

Explanation:

This is a right triangle because a right triangle has to have a right angle, an angle that measures . The angle on the far right is a  angle. 

This is not an equilateral triangle because an equilateral triangle has to have all sides equal in length, and no right angles. 

This is not an isosceles triangle because an isosceles triangle has two equal sides. 

 

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