IM Geometry Vocabulary

Front

Define altitude in a triangle.

Back

An altitude in a triangle is a line segment from a vertex to the opposite side that is perpendicular to that side.

Front

What is an angle bisector?

Back

A line through the vertex of an angle that divides it into two equal angles.

Tags

CCSS.HSG.CO.C.9

Front

What is an apex in geometry?

Back

The single point on a cone or pyramid that is the furthest from the base. For a pyramid, the apex is where all the triangular faces meet.

Tags

CCSS.1.G.A.1

CCSS.2.G.A.1

Front

Define arc in a circle.

Back

The part of a circle lying between two points on the circle.

Tags

CCSS.HSG.C.B.5

Front

What is arccosine?

Back

The arccosine of a number between 0 and 1 is the acute angle whose cosine is that number.

Tags

CCSS.HSF.TF.B.7

Front

What is arcsine?

Back

The arcsine of a number between 0 and 1 is the acute angle whose sine is that number.

Tags

CCSS.HSF-BF.B.4A

Front

What is arctangent?

Back

The arctangent of a positive number is the acute angle whose tangent is that number.

Tags

CCSS.HSF.TF.B.7

Front

Define assertion in mathematics.

Back

A statement that you think is true but have not yet proved.

Front

What is an auxiliary line?

Back

An extra line drawn in a figure to reveal hidden structure.

Front

Explain axis of rotation.

Back

A line about which a two-dimensional figure is rotated to produce a three-dimensional figure, called a solid of rotation.

Tags

CCSS.7.G.A.3