Triangle Classification and Venn Diagrams

Which triangle belongs in the intersection of 'Acute triangles' and 'Isosceles triangles'?

• F (triangle with two equal sides and a right angle)

• G (triangle with two equal sides, not a right angle)

• H (scalene triangle)

• J (triangle with two equal sides, all angles less than 90°)

A student used this graphic organizer to classify different figures. Which figures belong in the part of the organizer labeled 'Isosceles triangles'?

• Figures II and V only

• Figures I, III, and V only

• Figures I and III only

• Figures II, IV, and V only

What is the name of the subset of quadrilaterals missing from Akshar’s mobile?

• Hexagon

• Polygon

• Parallelogram

• Triangle

This graphic organizer is being used to classify triangles based on their angle measures or side lengths. Which list shows all of the ways this triangle could be classified?

• Acute only

• Equilateral only

• Acute and isosceles only

• Acute, isosceles, and equilateral only

Rachel classified shapes based on the types of angles they had. The table shows her classifications. Angle Types: Right Angles Only: Shape 1, Shape 2 Acute Angles Only: Shape 3, Shape 4 Obtuse Angles Only: Shape 5, Shape 6 Both Acute and Obtuse Angles: Shape 7, Shape 8 Which shape was not classified correctly?

• Shape 4

• Shape 5

• Shape 7

• Shape 8