Math Expressions Unit 8 Vocabulary

Front

What is an acute triangle?

Back

A triangle with three acute angles.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of the same length.

Front

What is an equilateral triangle?

Back

A triangle with three sides of the same length.

Front

What is an obtuse triangle?

Back

A triangle with an angle greater than 90 degrees.

Front

What is a composite solid?

Back

A solid figure made by combining two or more basic solid figures.

Front

What is area?

Back

The number of square units that cover a two-dimensional figure without gaps or overlap.

Front

What is a concave polygon?

Back

A polygon for which you can connect two points inside the polygon with a segment that passes outside the polygon. A concave polygon has a “dent.”

Front

What is a convex polygon?

Back

A polygon that is not concave. All the inside angles of a convex polygon have a measure less than 180°.

Front

What is a closed shape?

Back

A shape that starts and ends at the same point.

Front

What is a face?

Back

A flat surface of a three-dimensional figure.