Attributes of Shapes
How do you classify an angle less than 90 degrees?
acute angle
What do you call a polygon with 5 sides and 5 angles?
What do you call a triangle with one angle greater than a right angle?
obtuse triangle
What do all quadrilaterals have in common?
4 sides and 4 angles
Draw a rectangle. Partition it into 2 equal parts. Name the unit fraction each equal part represents.
Ex. a rectangle partitioned in half horizontally, vertically, or diagonally
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right angle
What do you call a polygon with six sides and six angles?
hexagon
What do you call a triangle with one right angle and two acute angles?
right triangle
This quadrilateral has only 1 pair of parallel sides. It has one right angle. Which quadrilateral is it?
trapezoid
Draw a square. Partition it into 4 equal parts. Name the unit fraction each equal part represents.
Ex. a square partitioned in half two times horizontally, vertically, or diagonally
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How do you classify an angle greater than a right angle, between 91 and 179 degrees?
obtuse angle
Draw three examples of figures that are polygons.
Ex. enclosed shapes with 3 or more straight sides that do not cross, such as pentagons, hexagons, and octagons
What do you call a triangle with three sides of equal length and three equal angles?
equilateral triangle
This quadrilateral has 4 right angles and all sides of equal length. Which quadrilateral is it?
square
Draw a circle. Partition it into 4 equal parts. Name the unit fraction each equal part represents.
Ex. a circle partitioned in half two times horizontally, vertically, or diagonally
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What are parallel lines? Draw an example of a polygon with at least one pair of parallel lines.
Ex. straight lines the same distance apart that will never cross
trapezoid, parallelogram, etc.
Draw 3 examples of figures that are not polygons.
Ex. open figures, figures with curved sides, figures with sides that cross
What do you call a triangle with two sides of equal length and two equal angles?
This quadrilateral has 2 pairs of parallel sides and opposite sides of equal length. It has 2 acute angles and 2 obtuse angles. Which quadrilateral is it?
parallelogram
Draw a hexagon. Partition it into 6 equal parts. Name the unit fraction each equal part represents.
Ex. a six-sided polygon partitioned in half diagonally and then each half partitioned into thirds; a hexagon decomposed into 6 triangles
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What are perpendicular lines? Draw an example of a figure with at least one pair of perpendicular lines.
Ex. straight lines that cross to form a right angle
square, rectangle, etc.
Name three things that define a polygon.
Ex. enclosed figure (not open), has only straight sides, sides do not cross, 3 or more sides
What do you call a triangle with no sides of equal length?
scalene triangle
Name three similarities and one difference between rhombuses and squares.
Differences: squares have four right angles
Draw an octagon. Partition it into 8 equal parts. Name the unit fraction each equal part represents.
Ex. an 8-sided polygon partitioned in half diagonally and then each half partitioned into fourths; an octagon decomposed into 8 triangles
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