I WONDER - What Is A Convex Octagon?

The video tutorial explains that internal angles of a shape should not exceed 180 degrees. If any internal angle is greater than 180 degrees, the shape is considered concave. A mnemonic to remember this is that 'concave' has a 'cave' in it, indicating an inward angle.

What is the maximum degree an internal angle can have without being considered concave?

• 200 degrees

• 180 degrees

• 120 degrees

• 90 degrees

What term is used to describe a shape with an internal angle greater than 180 degrees?

• Acute

• Linear

• Concave

• Convex

Which of the following is a characteristic of a concave shape?

• At least one angle is greater than 180 degrees

• All angles are exactly 180 degrees

• All angles are more than 180 degrees

• All angles are less than 90 degrees

How can you remember the concept of a concave angle?

• Think of a cave

• Think of a sharp point

• Think of a flat surface

• Think of a straight line

Which of the following is NOT true about concave shapes?

• They have at least one angle greater than 180 degrees

• They are also known as convex shapes

• They have internal angles that can exceed 180 degrees

• They can be remembered by thinking of a cave