Introduction to Geometry

Front

What does the word 'perpendicular' mean?

Back

Intersect at a right angle.

Front

What is the general name of a 3-sided shape?

Back

Triangle.

Front

The distance around the outside of a shape is the shape's ____________________.

Back

Perimeter.

Front

What is the general name of a 4-sided shape?

Back

Quadrilateral.

Front

What kind of angle is less than 90 degrees?

Back

Acute angle.

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

Front

What is the formula for the area of a rectangle?

Back

Length × Width.

Front

What do you call a polygon with five sides?

Back

Pentagon.

Front

What is the term for a line segment that connects two points on a circle?

Back

Chord.

Front

What is the name of an angle that is exactly 90 degrees?

Back

Right angle.