Polygons and Angles-3rd Grade

What are attributes (characteristics) we can use to describe polygons?

• They are closed.

• They have many angles.

• They have many sides.

• They only have straight sides.

• They are 2-dimensional.

What is this angle called?

• This angle is a straight angle.

• This angle is an obtuse angle.

• This is a right angle.

• This is an acute angle.

What is this angle called?

• This is a straight angle.

• This is an obtuse angle.

• This is an acute angle.

• This is right angle.

What is this angle called?

• This is a straight angle.

• This is an obtuse angle.

• This is an acute angle.

• This is a straight angle.

What are attributes (characteristics) of this angle?

• It is less than 90 degrees.

• It is 90 degrees.

• It makes a square corner.

• It is more than 90 degrees.

What type of triangle is this?

• This is an obtuse triangle.

• This is a right triangle.

• This is an acute angle.

• This is a straight triangle.

What type of triangle is this?

• This is an acute triangle.

• This is a right triangle.

• This is an obtuse triangle.

• This is a straight triangle.

What type of triangle is this?

• This is a straight triangle.

• This is a right triangle.

• This is an obtuse triangle.

• This is an acute triangle.

This is an equilateral triangle. What are some attributes of this triangle?

• It only has 2 equal sides.

• All of the sides are equal.

• It has 3 angles.

• It doesn't have any equal sides.

This is an isosceles triangle. What are some attributes of this triangle?

• It has 3 sides.

• It doesn't have any equal sides.

• All of its sides are equal.

• It has 2 equal sides.