Triangles

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The sum of all the internal angles of a triangle is always 180o no matter how the triangle is constructed.

The length of any side of a triangle is shorter than the sum of the other two sides.

A triangle can always be split into two right triangles no matter how the triangle is constructed.

all their angles are less than 90o.

SIN-opposite over hypotenuse 

COS -adjacent over hypotenuse 

TAN-opposite over adjacent 

SOH- opposite over hypotenuse 

CAH -adjacent over hypotenuse 

TOA-opposite over adjacent 

the functions of a calculator 

 A calculator is a device that performs arithmetic operations on numbers. The simplest calculators can do only addition, subtraction, multiplication, and division. More sophisticated calculators can handle exponential operations, roots, logarithms, trigonometric functions, and hyperbolic functions.