1.4 Pairs of Angles Adjacent angles- two angles with a common vertex and common side. (Side by side) Linear pair- a pair of adjacent angles that make a.

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Presentation transcript:

1.4 Pairs of Angles Adjacent angles- two angles with a common vertex and common side. (Side by side) Linear pair- a pair of adjacent angles that make a straight line 3+ 4=180°

Types of Angles Complementary angles- two adjacent angles that add up to 90° Supplementary angles- two adjacent angles that add up to 180°

Types of Angles Vertical angles- opposite angles formed by two intersecting lines. Vertical angles are congruent. 1 and 3 are vertical angles 1  3 2 and 4 are vertical angles 2 

Example What is the value of x in each problem? Ex1)Ex2) 8x = 180x = ° (8x+13)° (x+15)° 83°

Example What is the value of x in each problem? Ex3)Ex2) x+1 = 3602x – 7 = ° (3x+1)° (2x-7)° 85° 20°