Classifying Triangles
Triangle Sum Theorem
Old but relevant info
Exterior Angle Theorem
Isosceles/Equilateral
100
Angles that are less than 90 degrees
acute angles
100
The interior angles of a triangle add to what?
180 degrees
100
What does x= below?
x=22
100
Which angles are remote interiors?
1 and 2
100
What is the measure of angle J?
68 degrees
200
Triangles that have two congruent sides & two congruent angles.
Isosceles Triangles
200
Find the missing angle below.
The missing angle is 70 degrees.
200
Find x:
x=45
200
What angle is an exterior angle?
Angle 4
200
What is the measure of angle C?
37 degrees
300
Triangles that have a right angle and all different sides.
Right Scalene
300
What is the measure of angle T?
71 degrees
300
If a=65 degrees, what does b=?
b=25
300
What is the measure of the exterior angle?
149 degrees
300
What is the measure of angle P?
60 degrees
400
Triangles that have all acute angles and two congruent sides.
Acute Isosceles.
400
Solve for x.
x = 9
400
Solve for x:
x=16
400
What is the value of x?
x = 100
400
If ABC is an equilateral triangle, solve for x.
x = 13
500
Triangles that have all congruent sides & all congruent angles.
Equilateral/Equiangular Triangles
500
What is the value of x?
x = 50
500
Solve for x:
x = 117
500
What is the value of x?
x = 11
500
If this is an Isosceles triangle, find the measure of angle T.
74 degrees