Triangle Angle Sum
Exterior Angle Theorem
Older REVIEW: Angle Relationships
Sides of a Triangle
Longest/Shortest Side of Triangles.
100
What is the value of angle T?
What is T = 71o ?
100
If the two remote interior angles of a triangle are 60 degrees and 40 degrees, what is the exterior angle?
100 degrees.
100
Corresponding angles are always __________ .
What is congruent?
100
Could you make a triangle with side lengths of 1, 1, and 2 inches?
No.
100
The longest side of a triangle is always opposite the __________ ____________.
Largest angle.
200
If there is a right triangle with a 60 degree angle, what is the third angle?
What is 30 degrees?
200
What is the m∠ x ?
m ∠x= 149o
200
What is the relationship between angles 3 and 6 ?
What are Alternate Interior Angles.
200
Could you make a triangle with side lengths of 5, 3, and 9?
Yes.
200
The shortest side of a triangle is always opposite from the ___________ ____________ .
Smallest angle.
300
Find m ∠ D
What is 49o ?
300
What is the measure of the missing angle x?
What is 60o?
300
Are supplementary angles always linear pairs?
No.
300
Could you make a triangle with side lengths of 10, 4, and 9?
Yes.
300
What side of the triangle is the shortest? 
GE
400
Find the value of x
What is 45?
400
What is the value of y?
What is 15?
400
What is the relationship between angles 5 and 8?
What are Vertical Angles?
400
If you have two side lengths of a triangle that are 2 and 3, what is the smallest length that the third side length could be?
4
400
What angle is the smallest?
Angle B or ABC
500
Find the value of x.
What is 70 ?
500
What is the value of x and y?
What is 88o and 47o?
500
What is the relationship between angles 4 and 6 ? 
What is same side interior angles?
500
If two side lengths of a triangle are 10 and 13, what is the largest side the third side could be?
22
500
What side is the shortest?
Side AB