Angle Types
Parallel Lines and Transversals
Angles in Triangles
Interior Angles of Polygons
Similar Triangles
100
This type of angle is designated by a small square at the vertex.
90o
100
What is the measure of angle 7?
114o
100
The sum of the measure of the interior angles of all triangles is ___________.
180o
100
What is the sum of the interior angles of a quadrilateral?
360o
100
What does similar mean?
Same shape, different size
200
This type of angle is greater than 90o.
Obtuse
200
What is the measure of angle 2?
114o
200
A triangle has angles that measure 30o and 50o. What is the measure of its third angle?
100o
200
What is the sum of the interior angles of a pentagon?
540o
200
Triangle ABC has angle measures of 13o, 65o, and xo.
Triangle DEF has angle measures of 102o, 13o, and yo.
Are they similar?
Yes!
300
This type of angle is less than 90o.
Acute
300
What type of relationship do angles 1 and 8 have?
Alternating exterior angles
300
A triangle has angles that measure 27o and 81o. What is the measure of its third angle?
72o
300
What is the sum of the interior angles of a hexagon?
720o
300
Triangle ABC is dilated by a scale factor of 1/2 to create Triangle A'B'C'. Are the two triangles similar or congruent?
Similar
400
This pair of angles has a sum of 90o.
Complementary angles
400
What type of relationship do angles 4 and 5 have?
Alternating interior angles
400
A triangle has angles that measure xo, (x + 12)o, and 50o. What are its three interior angles?
59o, 71o, and 50o
400
What is the sum of the interior angles of a decagon?
1440o
400
Triangle ABC has a base of 3 ft and a height of 5 ft. Triangle DEF is similar to Triangle ABC and has a base of 4.5 feet. What is the height of Triangle DEF?
7.5 feet
500
This pair of angles has a sum of 180o.
Supplementary angles
500
Name all the angle numbers that measure 114o.
Angles 2, 3, and 7.
500
Triangle ABC is a right isosceles triangle. What are its three angle measures?
90o, 45o, and 45o
500
What is the measure of each interior angle of a regular octagon?
135o
500
Triangle ABC has a base of 6 ft and a height of 3 ft. Triangle DEF is similar to Triangle ABC and has a base of 4 feet. What is the height of Triangle DEF?
2 feet