Triangles
Quadrilaterals
Angles
Vocabulary
Random
100
The type of triangle with all sides congruent and angles.
Equilateral triangle.
100
Polygon with four congruent sides.
Rhombus
100
An angle greater than 90 degrees and less than 180 degrees.
Obtuse angle
100
Means "the same length or same size"
Congruent
100
This polygon has 4 congruent sides and 4 right angles.
Square
200
The type of triangle with no congruent sides or angles.
Scalene triangle
200
A quadrilateral with two pairs of congruent and parallel sides.
Parallelogram
200
An angle that is 180 degrees.
Straight angle OR straight line
200
The tool used to measure angles.
Protractor
200
True or False: A circle is not a polygon.
True
300
The type of triangle with one angle greater than 90 degrees.
Obtuse triangle
300
A polygon with two pairs of congruent and parallel sides and four right angles.
Rectangle
300
An angle less than 90 degrees.
Acute angle
300
A five-sided polygon
Pentagon.
300
A nine-sided polygon.
Nonagon
400
The type of triangle with two congruent sides.
Isosceles triangle
400
A four-sided polygon with two pairs of congruent sides but no parallel sides
Kite
400
90 degree angle.
Right angle
400
The total distance around a polygon
Perimeter
400
True or False: You can make an equilateral triangle with one right angle.
False
500
A triangle with three angles less than 90 degrees.
Acute triangle
500
A quadrilateral with only one pair of parallel sides.
Trapezoid.
500
What is this angle called?
Acute angle.
500
What do we call two lines that intersect for form a 90 degree angle?
Perpendicular
500
What is the diagonal of a right triangle called?
Hypotenuse.