Geometry Review Christmas

Front

What is the definition of congruent triangles?

Back

Triangles that have the same size and shape.

Front

What does HL stand for in triangle congruence?

Back

Hypotenuse-Leg, a method to prove the congruence of right triangles.

Front

What is the transformation represented by (x, y) --> (x + 2, y - 3)?

Back

A translation 2 units to the right and 3 units down.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

What is the Pythagorean theorem?

Back

In a right triangle, a² + b² = c², where c is the hypotenuse.

Front

What is the definition of a polygon?

Back

A closed figure with three or more straight sides.

Front

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

Back

180 degrees.

Front

What is the difference between a radius and a diameter?

Back

Radius is half the diameter; diameter is twice the radius.

Front

What is the definition of a circle?

Back

A set of points in a plane that are equidistant from a fixed point called the center.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2 * π * radius.