CLEAN : Beijing tightens security ahead of 70th anniversary

The video introduces two key concepts: 'came crashing' and 'triangle'. It briefly discusses these ideas, likely in the context of a larger lesson or topic.

What might the phrase 'came crashing' imply in a learning context?

• A sudden failure or problem

• An unrelated topic

• A gentle introduction

• A slow progression

Which of the following best describes a triangle?

• A shape with three sides

• A shape with no sides

• A shape with four sides

• A shape with five sides

In geometry, what is a key characteristic of a triangle?

• It has equal sides

• It has three angles

• It has four corners

• It is a circular shape

Which of the following is not a type of triangle?

• Equilateral

• Isosceles

• Scalene

• Quadrilateral

What is the sum of the interior angles of a triangle?

• 360 degrees

• 180 degrees

• 90 degrees

• 270 degrees