You gotta post the choices, but I'm guessing it's
Answer:
83.9°
Step-by-step explanation:
Pythagorean theorem, the well-known geometric theorem that the sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse (the side opposite the right angle)—or, in familiar algebraic notation, a2 + b2 = c2.
a= 13 cm
a2= 169cm
b= 4cm
b2=16 cm
a2+b2= 185cm (c2)
c=13.6cm
after wards use the law of cosines and c= 83.9°
Answer:
Length between two points:
So I didn’t read the whole thing but 20 is b.
Answer:
Part 1)
Part 2)
Step-by-step explanation:
we know that
The formula to solve a quadratic equation of the form
is equal to
Part 1)
in this problem we have
so
substitute in the formula
therefore
Part 2)
in this problem we have
so
substitute in the formula
therefore