math-triangle help

posted by .

I need help with this:

Given a right triangle with B=4 and
C=11 find A appoximated to three decimal places.

  • math-triangle help -

    Use the Pythagorean theorem, r^2 = y^2 + x^2

    r^2
    = 4^2 + 11^2
    = 16 + 121
    = 137
    = Square root of 137
    = 11.705

  • math-triangle help -

    This is how I would do it.

    Pythagorean theorem: a2 + b2 = c2.

    a^2 + 4^2 = 11^2

    a^2 +16 = 105
    subtract both sides by 16
    a^2 - 16 = 105 - 16
    a^2 = 105
    a = sqrt 105
    a = 10.247

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. trig

    Please answer b)only a) If a triangle has angles of 35 and 65 degrees, what is the measurment of the third angle?
  2. Math

    A triangle has 2 angles that measure 60 each. Which of the following best describes thiz triangle. A. Right isoseles triangle B. Equilateral triangle C. Obtuse isosceles triangle D. Acute scalene triangle
  3. 5 Pre-Calculus Questions

    1. What is the value of x in the right triangle below?
  4. Trigonometry

    In a right triangle ABC, C = 90°, B = 38° 35' and a = 6.434 mi. Solve for all the missing parts using the given information. (Round each answer to three decimal places for sides and to two decimal places for angle.)
  5. Math

    In a right triangle, find the length of the side not given. Approx to the three decimal places. a and b are the length of the legs and c is the length of the hypotenuse. b = 4"sqrt"2 and c = 9
  6. math

    given a right triangle ABC with the right angle at B find AB if AC = 25 in and BC = 6 in Approximate the length of AB to two decimal places
  7. Math Calculous

    Given a = 13, b = 29, find the missing sides and angles in the right triangle, where a is the side across from angle A, b, across from B, and c across from the right angle Round your answers to three decimal places c = 31,780, A = …
  8. Math

    True or false and if false write a true statement 1. A right triangle has three right angles. 2. A triangle that has three sides of the same length is an equilateral triangle. 3. An obtuse triangle has two angles that are acute. 4. …
  9. math

    Determine whether you can construct many, one, or no triangle(s) with each description. a)An isosceles triangle with angle measures of 40° and 100° b)A right triangle with three congruent sides c)A scalene triangle with side lengths …
  10. Math

    Triangle ABC has angles measuring 137°, 15°, and 28°. Classify the triangle by its angle measures. right triangle acute triangle obtuse triangle multiangular triangle I thinks it's c

More Similar Questions