Classifying Angles
Types of Triangles
Angle Measures
Miscellaneous
Angles and Areas
100
Angles that are less than 90 degrees
Acute
100
Triangles that have all sides equal
equilateral triangles
100
The little box in the corner of a triangle or any figure represents what?
A right angle
100
The name given to two angles with a sum of 180 degrees?
What is supplementary angles?
100
If one angle of a right triangle is 25 degrees, what is the remaining angle measurement?
What is 65 degrees
200
Angles that are equal to 180 degrees
Straight angles
200
Triangles that have no equal sides
scalene triangles
200
What is the measure of each interior angle of an equilateral triangle?
60 degrees
200
The name given to two angles with a sum of 90 degrees.
What is complementary angles?
200
True or false: the area of a trapezoid equals the area of a parallelogram
False. Area of parallelogram = bh, while the Area of a trapezoid = (b1 + b2)*h/2
300
Angles that are equal to 90 degrees
Right angles
300
Triangles that have two equal sides
isosceles triangles
300
How many angles are in a triangle?
3
300
What is the missing angle if a triangle has the following angles: 35 degrees and 65 degrees.
80 degrees!
300
What is the measurement of angle x?
55 + x = 90 (it's a right triangle), so x = 35 degrees
400
Angles that are greater than 90 degrees but less than 180 degrees
Obtuse angles
400
Triangles that have three angles less than 90 degrees
acute triangles
400
Can a triangle have these angle measures?
30, 60, 90.
Yes they add up to 180.
400
A parallelogram has what kind of sides?
What is two sets of parallel lines?
400
What are the measurements of angles x and y?
x + 150 = 180, so x = 30 degrees
x and y are vertical angles, so y = 30 degrees
500
The number of degrees total in a triangle
180 degrees
500
Triangles that have one angle greater than 90 degrees
obtuse triangles
500
What are the 3 types of triangles by sides.
Scalene, Equilateral, Isosceles
500
The formula for the area of a triangle
What is A = (1/2)bh
500
Find angles x and y
x = 120 degrees
y = 50 degrees
600
What are the 3 types of angles?
Acute, Obtuse, and Right.
600
Triangles that have one 90 degree angle
right triangle
600
If one angle in a linear pair is 5 degrees, what is the other angle's measurement?
175 degrees
600
The formula for the area of a parallelogram
What is A = bh?
600
Solve for x
2x + 30 + x = 360, so x = 110 degrees