Polygons Vocabulary Part I

A triangle in which all three sides have different lengths is a _________.

• Scalene triangle

• Isosceles triangle

• Equilateral triangle

• Obtuse triangle

A triangle in which at least two sides have the same length.

• Scalene triangle

• Isosceles triangle

• Acute triangle

• Equilateral triangle

A triangle in which the three sides are the same length.

• Scalene triangle

• Isosceles triangle

• Equilateral triangle

• Right triangle

A triangle that has three acute angles is an ___________ triangle.

An obtuse triangle has one _____________ angle.

A __________ triangle has an angle that measures 90 degrees.

Lines that keep the same distance from each other and never intersect are called _______________ lines.

• Perpendicular

• Intersecting

• Straight

• Parallel

Lines that intersect to form right angles are called __________ lines.

• Perpendicular

• Parallel

• Straight

• Equilateral

A polygon is a shape with 3 or more straight sides such as a...

• Triangle

• Square

• Circle

• Rectangle

What's true about a parallelogram?

• It has only one pair of parallel sides.

• It has two pairs of parallel sides.

• All its sides have different lengths.

• It has only one right angle.