Geometry Academic Vocabulary

Which choices best describe and model an obtuse angle?

• measures 90 degrees

• 
• measures more than 90 degrees but less than 180 degrees

• 

Which word means when one shape becomes exactly like another a flip, slide, or turn

• polygon

• attribute

• symmetry

• isosceles

A polygon is

• a closed figure with 3 or more straight sides

• a closed figure

• an four-sided figure

• a circle

I am a shape with four equal sides and right angles. Which choices best describe my name and attributes?

• 
• square

• 
• 

Which best describes the rectangle above?

• I am a quadrilateral with opposite sides equal and 4 right angles.

• I am a shape with four equal sides and right angles.

• I am a quadrilateral with 2 sets of equal sides of different lengths without 90 degree angles.

• I am a parallelogram with four equal sides, opposite equal angles, and no right angles.

Which best describes an isosceles triangle?

• A polygon with 3 sides.

• A triangle having 2 sides of the same length.

• A triangle having all sides of different lengths.

• A triangle having all sides the same lengths.

Which best describes a scalene triangle?

• A polygon with 3 sides.

• A triangle having all sides the same length.

• A triangle having 2 sides of the same length.

• A triangle having all sides of different lengths.

The angle formed by two perpendicular lines is

• an obtuse angle

• an acute angle

• a right angle

• a triangle

An acute angle is

• the angle formed by two perpendicular lines

• an angle that measures 180 degrees

• an angle more than 90 degrees but less than 180 degrees

• an angle less than 90 degrees

A polygon with 3 sides is

• a quadrilateral.

• a pentagon.

• an angle.

• a triangle.