Classifying Two-Dimensional Shapes

This video tutorial covers the classification of two-dimensional figures by examining lines and angles. It begins with an introduction to classifying figures, followed by a detailed explanation of different types of angles in triangles, including acute, obtuse, and right angles. The tutorial then explores how to classify triangles based on the length of their sides and the types of angles they contain, such as equilateral, isosceles, and scalene triangles. Finally, the video discusses the concepts of parallel and perpendicular lines, providing examples of how to identify these lines in various shapes.

What type of angle is less than 90 degrees?

• Straight

• Acute

• Right

• Obtuse

Which triangle has all angles equal and less than 90 degrees?

• Right

• Isosceles

• Equilateral

• Scalene

What type of triangle has one angle exactly 90 degrees?

• Obtuse

• Equilateral

• Right

• Acute

Identify the triangle with two equal sides and one angle greater than 90 degrees.

• Scalene

• Acute equilateral

• Right isosceles

• Obtuse isosceles

What describes a triangle with no equal sides or angles?

• Isosceles

• Acute

• Equilateral

• Scalene

Which lines are described as never touching each other?

• Parallel

• Perpendicular

• Converging

• Intersecting

What type of lines meet to form a 90 degree angle?

• Parallel

• Divergent

• Perpendicular

• Oblique

Which shape has all sides parallel and perpendicular?

• Rectangle

• Triangle

• Square

• Rhombus

Which figure does not have any perpendicular lines?

• Triangle

• Rectangle

• Rhombus

• Square

In which figure are the opposite sides parallel?

• Triangle

• Square

• Rectangle

• Circle