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# Algebra 1 Semester I

### Know your equations and terms.

TermDefinition
AA Similarity Two pairs of corresponding angles are the same on 2 triangles. The triangles are considered similar.
Triangle Inequality Relationships for the 3 lengths in order to form a triangle.
Acute Sum of squares of lengths of 2 shorter sides is greater than square of longest side.
Obtuse Sum of squares of lengths of 2 shorter sides is less than square of longest side.
Right Sum of squares of lengths of the two shorter sides is equal to square of longest side.
Pythagorean Theorem Formula (leg 1)²+(leg 2)²=(hypotenuse)²
Real Number Both rational and irrational number.
Graph Associations (Types of) Positive-Negative-None Linear-Non Linear Strong-Weak
Area of Circle Formula π×r²
Area of a Square or Rectangle Formula L×W
Area of Triangle Formula b×h÷2
Area of Trapezoid Formula [(b¹+b²)÷2]h
Created by: Llamas^_^