Vocabulary
Angles
Triangles
Circles
Miscelaneous
100
two lines that are the same distance apart and will never touch
What is parallel lines
100
This is the term for a 90 degree angle
What is right angle
100
A triangle that has all sides the same length
What is equilateral
100

What is the distance from the center of a circle to any point on the circle called?

Radius

100
A shape that has 6 sides is called
What is a hexagon
200
lines that intersect to form a right angle
What is perpendicular
200
An angle that is less than 90 degrees
What is acute
200
A triangle with two sides the same length
What is isosceles
200

What is the plural of radius?

Radii

200

A line that intersects two or more lines at different points is called a __________.

Transversal

300

What is the difference between a linear pair and supplementary angles?

Supplementary angles add to 180°. A linear pair is a special type of supplementary angles that are adjacent and form a straight line.

300

What tool is used to measure angles?

A protractor

300

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

180 degrees

300

True or False: The diameter of a circle is always twice the radius.

True

300

Angles that are in the same relative position at each intersection where a transversal crosses two lines are called __________.

Corresponding angles.

400

What do we call the corner or point where two rays meet?

What is a vertex

400
this is the number of degrees in a straight angle
What is 180 degrees
400

Which postulate proves congruence using two sides and the included angle?

SAS

400

What is the segment that passes through the center of a circle and touches two points on the circle?

Diameter

400

Which postulate uses two angles and a non-included side to prove triangle congruence?

AAS

500

What does CPCTC stand for and when is it used?

CPCTC = Corresponding Parts of Congruent Triangles are Congruent. We use it after proving two triangles congruent to show matching sides/angles are equal.

500

Which construction creates two equal angles from one angle?

Angle Bisector

500

If one angle of a triangle is 90°, and another angle measures 35°, what is the measure of the third angle?

55 degrees

500

If the radius of a circle is 6 cm, what is the length of its diameter?

12 cm

500

Which postulate uses two angles and the included side to prove triangle congruence?

ASA

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