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First we need to calculate the 2 angles that make up Angle B at the top of the triangle.
Using that angle we can find the length of CD.
See the attached picture:
Using that angle we can find the length of CD.
See the attached picture:
3.5 belongs to Rational number sets mainly and also belongs to Real Numbers.
<u>Step-by-step explanation:</u>
Number Sets are nothing but group of number classified into groups.
They are Natural, Whole, Integers, Rational, Irrational and Real numbers.
Natural number set = {1,2,3...},
Whole number set= {0,1,2,3...},
Integers = { ....-2, -1, 0, 1, 2, ....},
Rational numbers = { Integers, Decimals, Fractions},
Irrational numbers = { non fractional numbers eg: π, etc.}
Real = { Natural, Whole, Integers, Rational, Irrational }.
Any number which is a fraction resulting in a decimal value is Rational Number sets.
3.5 is a decimal number so it can be Rational Number sets also Real Number sets.