Angles of Polygons

• Mathematics
• Secondary Education

What can you observe from the following pictures?

What can you observe from the following pictures?

What can you observe from the following pictures?

What can you observe from the following pictures?

What can you observe from the following pictures?

What can you observe from the following pictures?

^{The pictures show different kinds of polygons. And the angles on the polygons were emphasized.}

The angles will be shown on the next slide.

For a short review, what is a polygon?

Triangle

Quadrilateral

Pentagon

Hexagon

etc.

Going back  with the pictures again, What forms an angle?

From that definition, how will you define angle in a polygon?

Two types of angles in a Polygon:

Interior Angle

Exterior Angle

Measurements of the interior and exterior angles

ACTIVITY

Define angle.

What are the two types of angles in a polygon? Choose one only.

1. interior angle
2. complementary angle
3. supplementary angle
4. exterior angle

It is the angle formed between the line extended and the side adjacent to side that is extended.

1. complementary angle
2. exterior angle
3. supplementary angle
4. interior angle

It is the angle formed between two adjacent sides of a polygon and is found inside the polygon.

1. exterior angle
2. interior angle
3. supplementary angle
4. complementary angle

If an interior angle measures 88 degrees, find the measurement of its exterior angle.

If an exterior angle measures 126 degrees, what would be the measurement of its interior angle?

State the relationship between the measurement of interior angle and exterior angle of a polygon.

END