6th Grade Geometry Vocabulary Quiz

What is an acute triangle?

• A triangle with one interior angle equal to 90°

• A triangle with all interior angles less than 90°

• A triangle with one interior angle greater than 90°

• A triangle with all interior angles equal to 90°

Putting shapes together to form a single, new shape is called:

• Integration

• Composition

• Subtraction

• Decomposition

What is the act of taking shapes apart to make more than one new shape called? Choose the correct term.

• Dissection

• Decomposition

• Partitioning

• Fragmentation

A flat surface on a three-dimensional figure is called...

• Face

• Edge

• Vertex

• Angle

What is an obtuse triangle?

• A triangle with one angle exactly 90°

• A triangle with one angle greater than 90°

• A triangle where all angles are equal

• A triangle with all angles less than 90°

What is a parallelogram?

• A quadrilateral that has two pairs of parallel sides.

• A quadrilateral that has one pair of parallel sides.

• A three-sided polygon with all sides equal.

• A quadrilateral that has no parallel sides.

What is a polygon?

• A shape with both straight and curved edges forming a complex boundary.

• A two-dimensional shape that is closed and made of straight sides or edges.

• A three-dimensional shape that has curved surfaces and no edges.

• A two-dimensional shape that is open and made of curved sides.

What is a decagon?

• A five-sided polygon.

• A ten-sided polygon.

• A twelve-sided polygon.

• A six-sided polygon.

What is a dodecagon?

• A twelve-sided polygon.

• A six-sided polygon.

• A ten-sided polygon.

• A eighteen-sided polygon.

What is a heptagon?

• An eight-sided polygon.

• A seven-sided polygon.

• A six-sided polygon.

• A five-sided polygon.