Transcript Slide 1
Pre-Algebra Enrichment
Classifying Angles
Acute angle- An angle that measures less
than 90 degrees.
Obtuse angle- An angle that measures
more than 90 degrees and less that 180
degrees.
Right Angle- An angle that measures 90
degrees.
Question #1
If an angle is 180 degrees it is
a(n)…
Right Angle
Straight Angle
Obtuse Angle
Acute Angle
Sorry!
Your answer was incorrect, please try again!
Correct!
Great job! It is a straight angle. Please
continue.
Classifying Triangles (based on
sides)
Equilateral Triangle- A triangle with three
equal sides
Isosceles Triangle- A triangle with at least
two equal sides
Scalene Triangle- A triangle with no equal
sides
Classifying Triangles (based on
angles)
Right Triangle- A triangle containing a right angle
Acute Triangle- A triangle that has three acute
angles
Obtuse Triangle- A triangle that has one obtuse
angle and two acute angles
Equiangular Triangle- A triangle that has three
equal angles
Question #1A
If a triangle has three equal sides it
is called…
Equiangular
Equilateral
Isosceles
Scalene
OOPS!
Sorry, that was incorrect, you better review
your triangle information and then try
again!
Congratulations!
You know your stuff! Continue on to further
test your triangle knowledge.
Question #2
A triangle with an angle greater
than 90 degrees is called…
An acute triangle
An isosceles triangle
An obtuse triangle
A right triangle
Sorry!
Your answer was incorrect, please try again!
Correct!
Great job! It is an obtuse triangle. Please
continue.
Question #3
What kind of triangle is this:
Right Triangle
Scalene Triangle
Neither Right or Scalene
Both Right and Scalene
Incorrect!
Correct!
General Triangle Properties
Triangles are three-sided polygons.
All triangles have an angle sum of 180
degrees based on the Triangle Sum
Theorem.
Question #4
A triangle with 4 sides must have an
angle sum of:
180
360
240
A triangle cannot have 4 sides.
OOPS!
Excellent!
Question #5
What is the angle sum of:
360 degrees
180 degrees
270 degrees
There is no way of knowing what the angle
sum is.
Sorry!
Great Job!
Angle Pairs:
Complementary Angles- angles that have
measures that add to 90 degrees.
Supplementary Angles- angles that have
measures that add to 180 degrees.
Question #6
The following angles are considered…
Complementary
Supplementary
Complementary and Supplementary
None of the Above
Incorrect
Correct!
Question #7
A 6 sided figure is called what and has a
degree measure of what?
Hexagon, 540
Hexagon, 720
Heptagon, 540
Heptagon, 720
OOPS!
Excellent!
Congruency
Congruent is another word for equal.
Question #8
The second angle of a triangle is two times the
measure of the first angle. The third angle is 3
times the measure of the second angle what is the
measure of each angle?
1st- 30º, 2nd- 60º, and 3rd- 90º
1st- 20º, 2nd- 40º, and 3rd- 120º
1st- 20º, 2nd- 60º, and 3rd- 100º
Sorry!
Great Job
Question #9
If two sides of a triangle are said to
be congruent that means that they
are different lengths. True or False.
True
False
Incorrect
Correct
Transversals of Parallel Lines
A transversal is a line that intersects any two or
more other lines.
When a transversal intersects parallel lines the
angles formed have the following properties:
1. All acute angles formed are congruent.
2. All obtuse angles formed are congruent.
3. Any acute angle is supplementary to any
obtuse angle formed.
Question #10
What types of angles are 4 and 6?
•
Corresponding Angles
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
Alternate Interior Angles
Alternate Exterior Angles
OOPS!
Excellent!
Question #11
What types of angles are 2 and 6?
•
The angles are alternate
interior.
•
The angles are corresponding.
•
The angles are vertical.
•
Not enough information.
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
Wrong Answer
Correct
Question #12
What types of angles are 1 and 7?
•
Vertical Angles
•
Corresponding Angles
•
Alternate Exterior Angles
•
Alternate Interior Angles
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
OOPS!
Great Job!
Slope
The slope of any line is:
Vertical Change
Horizontal Change
Which is the same as: Rise
Run
Question #13
What is the slope of the top line?
•
1
•
-1
2
-2
QuickTime™ and a
TIFF (Uncompressed) decompressor
are needed to see this picture.
Incorrect
Correct
Question #14
What is the slope of this line?
0
1
Not enough information.
OOPS!
Great Job
Question # 15
What is the slope of this line?
1
0
Undefined
-1
Not Enough Information
Sorry
Excellent
The End!