Classifying Angles
Angles of a Triangle
Supplementary and Complementary
Vertical Angles
Triangle Inequality Theorem and Angles of a Triangle
100
Angles that are less than 90 degrees
acute angles
100
The internal angles of a triangle sum to what?
180 degrees
100
The name given to two angles with a sum of 180 degrees?
supplementary angles
100
Vertical angles are always...
Equal or congruent
100
How many triangles can you make with the following measurements? Why?
3 in, 5 in, 1 in
0 triangles
because 3 + 1 = 4 which is less than 5
200
Angles that are equal to 180 degrees
straight angles
OR
a straight line
200
Find the missing angle below.
The missing angle is 70 degrees.
200
The name given to two angles with a sum of 90 degrees.
complementary angles
200
What is the measurement of angle b?
b = 74
200
How many triangle possibilities?
Why?
20 degrees, 70 degrees, 90 degrees
20 + 70 + 90 = 180 infinite
300
Angles that are equal to 90 degrees
right angles
300
Two interior angle measures of a triangle are 74 degrees and 53 degrees. What is the measure of the third interior angle?
53 degrees
300
If a=65 degrees, what does b=?
b=25
300
Find the measurement of angle b.
b=32 degrees
300
How many triangle possibilities?
7 cm, 9cm, 7 cm
1 triangle
7 + 7 = 14 which is greater than 9
400
Angles that are greater than 90 degrees but less than 180 degrees
obtuse angles
400
Find the missing angle.
85 degrees
400
Solve for x:
x=16
400
What does x= below?
x=22
400
How many triangle possibilities?
why?
30 degrees, 30 degrees, 90 degrees
0 triangles
30 + 30 + 90 = 150 which is not 180
500
The number of degrees in a triangle
180 degrees
500
Can you draw a triangle with the following angle measures? 75 degrees, 75 degrees, and 40 degrees?
No, because 75+75+40 = 190
500
Solve for x:
x = 51
500
Find x:
x=45
500
How many triangle possibilities?
why?
4 ft, 4 ft, 4 ft
1 triangle
4 + 4 = 8 which is greater than 4