Despite having no superpowers, the Joker is one of Batman's greatest adversaries.
Answer: 180 degrees
The sum of all the angles of a triangle is always 180 degrees.
Giraffes are the tallest animals on earth. Some giraffes can grow up to a height of 18 feet.
Google Search is the world's most famous search engine. It was launched in September 1997.
A thermometer is a piece of measuring equipment used in measuring temperature.
Athens in Greece is the birthplace of democracy.
A collection of stars is referred to as a galaxy.
Africa is the second largest continent in the world.
Arnold Schwarzenegger was the 38th Governor of California. He occupied that post from 2003 to 2011.
A millennium is a period of a thousand years. It got its name from the word "mille", which is Latin for one thousand.