All about Angles
what is a right angle?
A right angle is an angle that measures exactly 90 degrees.
How many sides does a hexagon have?
six sides
The _____ is the total distance around the outside of a shape or figure.
perimeter
what does symmetrical mean?
A shape or object is symmetrical if it can be divided into two equal parts or halves that mirror each other. In other words, if you were to fold it along a line, the two sides would match exactly.
give an example of a right angle
An example is the corner of a book or a square piece of paper.
What is a polygon?
A polygon is a closed shape with straight sides.
An angle is formed by two rays or line segments that share a common endpoint, called the vertex.
Angle
is a square symmetrical?
yes
what are the 3 main types of angles?
acute, right, obtuse
Name a polygon with eight sides.
an octagon
what angle measures exactly 90 degrees?
a right angle
what is rotational symmetry?
rotational symmetry means a shape looks the same after you turn it
what is an acute angle?
An acute angle is an angle that measures less than 90 degrees
is a circle a polygon?
no, because it does not have straight sides
is the measure of the amount of space enclosed by a two-dimensional shape.
area
What is the sum of the interior angles of a quadrilateral?
The sum of the interior angles of a quadrilateral is 360 degrees.
an obtuse angle is more than ____ degrees
more than 90 but less than 180
Can a polygon have an odd number of sides?
Yes, a polygon can have an odd number of sides. An example is a pentagon, which has five sides.
______ are lines in the same plane that never intersect, no matter how far they are extended.
parallel lines
If a polygon has 12 sides, what is it called?
a dodecagon