1. Angle Relationships
Teacher Twins©2014

2. Warm Up 49 + b + 45 = 180 x + 98 + 55 =180 15 + 67 + k = 180 b = 86

3. Angle Relationships

4. Angle Review acute right obtuse straight
Angles that have measures less than 90⁰ are ___________ angles.
Angles that have measures equal to 90⁰ are ___________ angles.
Angles that have measures greater than 90⁰ are ___________ angles.
Angles that have measures equal to 180⁰ are ___________ angles.
acute
right
obtuse
straight

5. __________ angles are opposite angles formed by lines that intersect
__________ angles are opposite angles formed by lines that intersect. They are congruent.
__________ angles share a common side and have the same vertex. They do not overlap.
The sum of the measures of ____________ angles is 90⁰.
The sum of the measures of ____________ angles is 180⁰.
Vertical
Adjacent
complementary
supplementary

6. Practice 1.
142⁰
150⁰

7. Adjacent- a& b, b & c, c & d, d & e, e & f, f & a
3. List all of the vertical angles and all of the adjacent angles in the figure below.
Vertical- a & d , b & e, f & c
Adjacent- a& b, b & c, c & d, d & e, e & f, f & a
c = 80⁰, d = 30⁰, e = 70⁰, f= 80⁰

8. Closure List all angle types for the picture below.
< 1 acute, <2 obtuse,
< 1 & 2 adjacent, straight, supplementary