Geometry Circles and Polygons

What is the difference between a radius and a diameter of a circle?

• The radius is twice the diameter

• The diameter is twice the radius

• They are the same length

• The radius goes around the circle, the diameter goes through it

What is the name of a polygon with exactly eight sides?

• Hexagon

• Heptagon

• Octagon

• Nonagon

What does "supplementary" mean when referring to angles?

• The angles add up to 90°

• The angles add up to 180°

• The angles are the same size

• The angles form a right angle

What is the difference between a regular polygon and an irregular polygon?

• Regular polygons have more sides

• Regular polygons have all sides and angles equal, irregular polygons don't

• Regular polygons are always triangles

• There is no difference; all polygons are regular

Find measure of angle R.

• 24

• 41

• 67

• 139

What is a "diagonal" in a polygon?

• A line segment that connects any two vertices not on the same side

• A line segment that forms the perimeter of the polygon

• The longest side of the polygon

• A line that bisects the polygon into two equal parts

What is the difference between "area" and "perimeter" of a two-dimensional shape?

• Area is the space inside the shape, perimeter is the distance around it

• Area is the distance around the shape, perimeter is the space inside it

• Area is always measured in square units, perimeter in cubic units

• There is no difference; they are the same thing

What does "congruent" mean when referring to geometric shapes?

• Having the same shape but different sizes

• Having the same size and shape

• Having the same area but different shapes

• Having the same perimeter but different shapes

What does "similar" mean when comparing two geometric figures?

• They have the same size and shape

• They have the same shape but may be different sizes

• They have the same area but different shapes

• They have the same perimeter but different shapes

A circle has a radius of 8 cm. The measure of the arc of the shaded section is 72⁰. Which is closest to the area of the shaded section of the circle?

• 10.1 cm²

• 40.2 cm²

• 50.3 cm²

• 160.8 cm²