Properties of Triangles and Polygons

The lesson covers various geometric concepts, focusing on polygons, right triangles, and spheres. It explains the properties of regular polygons and different types of quadrilaterals, such as parallelograms, rectangles, squares, rhombuses, and trapezoids. The video also includes exercises to determine the truth of statements about these shapes and concludes with identifying regular polygons.

What is a closed plane figure with three or more line segments called?

• Line

• Polygon

• Ellipse

• Circle

In a right triangle, what is the name of the side opposite the right angle?

• Height

• Base

• Leg

• Hypotenuse

What is the term for the distance across a sphere passing through its center?

• Circumference

• Chord

• Radius

• Diameter

Which of the following is a regular polygon with all sides and angles equal?

• Scalene Triangle

• Regular Hexagon

• Irregular Pentagon

• Trapezoid

What is a quadrilateral with opposite sides parallel called?

• Rhombus

• Trapezoid

• Kite

• Parallelogram

Which quadrilateral has four right angles and opposite sides equal?

• Rectangle

• Parallelogram

• Rhombus

• Trapezoid

True or False: A trapezoid is a type of quadrilateral.

• False

• True

True or False: A scalene triangle can also be isosceles.

• True

• False

Identify the regular polygon with ten equal sides.

• Decagon

• Nonagon

• Octagon

• Heptagon

How many sides does a regular heptagon have?

• Eight

• Five

• Seven

• Six