Types of Angles
Vocabulary
Types of Triangles
Angles in Circles
Challenge Questions
100

Angles are formed by putting together two of these two geometry figures.

What are rays?

100

This geometry term describes a dot that is named by a capital letter.

What is a point?

100

This type of triangle has three equal sides.

What is an equilateral triangle?

100

This angle in a circle creates two 180 degree angles.

What is a straight angle?

100

This is the name of the device we use to measure angles.

What is a protractor?

200

This is the place that the center of your protractor should line up with to measure an angle.

What is the vertex?

200

This geometry term is a straight path that goes on forever in both directions.

What is a line?

200

This type of triangle has one angle that is 90 degrees.

What is a right triangle?

200

This type of angle in a circle is less than 90 degrees.

What is an acute angle?

200

This prefix means three.

What is "tri"?

300

This type of angle is greater than 90 degrees.

What is an obtuse angle?

300

This geometry term is part of a line that has two ends.

What is a line segment?

300

These are the two ways to categorize triangles.

What are sides and angles?
300

You can have this many 90 degree angles in a circle.

What is four?

300

This type of triangle has no equal sides.

What is scalene?

400
When naming an angle, the answer should include these elements.

What are the angle symbol and the letters of the angle with the vertex in the middle.

400

This geometry term is formed by two rays with the same endpoint.

What is an angle?

400

This type of triangle has two equal sides.

What is an isosceles triangle?

400
An entire circle has this many degrees.

What is 360 degrees?

400
It is impossible to have this angle in an obtuse triangle.

What is a 90 degree angle?

500

This is a way to double check if your angle measurement is correct.

What is determine whether it is acute or obtuse before you measure?

500

This geometry term is the point where two rays in an angle come together.

What is the vertex?

500

This type of triangle has one angle that is greater than 90 degrees.

What is an obtuse triangle?

500

This type of angle in a circle is greater than 180 degrees.

What is a reflex angle?

500

Every acute triangle has this many acute angles.

What is 3?

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