Section 1.1 Angles: Notation: January 17,...
Transcript of Section 1.1 Angles: Notation: January 17,...
sect1_1.notebook
2
January 17, 2018
Degree Measure
1 Revolution = _____
1° = _____ of a revolution
The measure is ____________ if we rotate counterclockwise to get from the initial side to the terminal side. Otherwise, if we rotate clockwise, the measure is ____________.
sect1_1.notebook
4
January 17, 2018
Complementary angles: Sum is ______
Supplementary angles: Sum is ______
EX: Find the complement and the supplement of 25°.
sect1_1.notebook
5
January 17, 2018
Triangles:Acute: All three angles are acute
Right: One right angle (90°)
Obtuse: One obtuse angle
sect1_1.notebook
6
January 17, 2018
Triangles:
Equilateral:All three sides are equal in length
Isosceles: Two sides and their opposing angles are equal
sect1_1.notebook
7
January 17, 2018
Theorem: The sum of the measures of the internal angles in any triangle is ______.
The Pythagorean TheoremIn any right triangle, the square of the hypotenuse is equal to the sum of the squares of the legs.
a
b
c
In symbols: