Identifying and classifying triangles

Which of the following is true about an obtuse triangle?

• A

  All of its angles measure less than 90 degrees

• B

  One of its angles measures exactly 90 degrees

• C

  All of its angles measure more than 90 degrees

• D

  One of its angles measure more than 90 degrees

Tags

CCSS.4.G.A.2

Select all of the attributes that the empty space could have.

• All equal sides

• Two sides that are equal

• No right angles

• All sides equal length and equal angles

• Three sides with different lengths

Tags

CCSS.4.G.A.2

Classify the triangle shown in the diagram.

Equal sides and equal angles, if any, are indicated in each diagram.

• acute scalene

• equilateral

• obtuse scalene

• acute isosceles

Tags

CCSS.4.G.A.2

Is this an obtuse triangle?

3, 14, 18

• Yes

• No

Tags

CCSS.4.G.A.2

Acute triangles are triangles with only acute angles inside.

Select ALL the acute triangles below.

(There are 2 correct answers)

• 
• 
• 
• 

Tags

CCSS.4.G.A.2

Classify the following triangle in as many ways as possible. 

• Scalene, acute
• Isosceles, obtuse
• Equilateral, equiangular, acute
• Equilateral

Tags

CCSS.4.G.A.2

What type of triangle has one angle greater than 90 degrees?

• Acute triangle

• Right triangle

• Obtuse triangle

• Equilateral triangle

Answer explanation

An obtuse triangle has one angle greater than 90 degrees, making it the correct choice in this scenario.

Tags

CCSS.4.G.A.2

What is a scalene triangle?

• A triangle with no equal sides and no equal angles

• A triangle with one right angle

• A triangle with all sides equal

• A triangle with two equal sides

Tags

CCSS.4.G.A.2

Select the angles that identify a right triangle.

• acute, acute, acute

• acute, acute, right

• acute, acute, obtuse

• acute, right, obtuse

Tags

CCSS.4.G.A.2

LOOKING AT SIDES: WHAT KIND OF TRIANGLE IS THIS

• SCALENE

• ISOSCELES

• EQUILATERAL

Tags

CCSS.4.G.A.2