Hello!

Use the Pythagorean Theorem to solve for the hypotenuse:
a² + b² = c²
Plug in the given values:
12² + 4² = c²
144 + 16 = c²
160 = c²
Take the square root of both sides:
c = √160
c ≈ 12.65.
Cos A will be 60°.
Because When, cos is 1/2 then theta or angle is degree 60°
Answer:
The vertex is the point (-1,2)
Step-by-step explanation:
we have

Convert into vertex form
Group terms that contain the same variable, and move the constant to the opposite side of the equation

Complete the square. Remember to balance the equation by adding the same constants to each side.


Rewrite as perfect squares

----> equation in vertex form
The vertex is the point (-1,2)
-24 is the missing quotient