The two

The two angles of a triangle are 78° and 82°. So what is the measure of the remaining third angle?

Correct answer:

C =  20 °

Step-by-step explanation:

A=78 ° B=82 °  A+B+C=180°  C=180AB=1807882=20°



Did you find an error or inaccuracy? Feel free to write us. Thank you!



avatar







Tips to related online calculators
See also our trigonometric triangle calculator.

 
We encourage you to watch this tutorial video on this math problem: video1

Related math problems and questions:

  • Triangles
    triangles Find out whether given sizes of the angles can be interior angles of a triangle: a) 23°10',84°30',72°20' b) 90°,41°33',48°37' c) 14°51',90°,75°49' d) 58°58',59°59',60°3'
  • A straight angle
    angles A straight angle measures s, so you can subtract or add 85 from What are the measure of their angles?
  • Complementary angles
    angles Two angles are complementary. If one angle measures 10°, what is the measure of the second angle?
  • The sum 11
    angles The sum of the measures of two angles is 89°. One angle has a measure of 64°. What is the measure in degrees of the second angle?
  • Angles
    triangle The triangle is one outer angle 158°54' and one internal angle 148°. Calculate the other internal angles of a triangle.
  • 3-bracket 3
    triangle Two angles in a triangle are 90° and 60°. Has triangle at least two equal sides?
  • The angles ratio
    123_triangle The angles in the ABC triangle are in the ratio 1: 2: 3. find the sizes of the angles and determine what kind of a triangle it is.
  • Outer angles
    triangle_1111 The outer angle of the triangle ABC at the A vertex is 71°40 ' outer angle at the vertex B is 136°50'. What size has the inner triangle angle at the vertex C?
  • Inner angles
    rr_triangle3 The magnitude of the internal angle at the main vertex C of the isosceles triangle ABC is 72°. The line p, parallel to the base of this triangle, divides the triangle into a trapezoid and a smaller triangle. How big are the inner angles of the trapezoid?
  • Gamma angle
    triangle1 Find the magnitude of the gamma angle in triangle ABC if: α = 38° 56 ’and β = 47° 54’.
  • Two angles
    rt_1 The triangles ABC and A'B'C 'are similar. In the ABC triangle, the two angles are 25° and 65°. Explain why in the triangle A'B'C 'is the sum of two angles of 90 degrees.
  • Similarity
    similar_triangle Are two right triangles similar to each other if the first one has an acute angle 70°, and the second one has an acute angle 20°?
  • The triangles
    triangle_rt_taznice The triangles ABC and A'B'C 'are similar with a similarity coefficient of 2. The angles of the triangle ABC are alpha = 35°, beta = 48°. Determine the magnitudes of all angles of triangle A'B'C '.
  • Internal and external angles
    inner_outer_angles_triangle Calculate the remaining internal and external angles of a triangle, if you know the internal angle γ (gamma) = 34 degrees and one external angle is 78 degrees and 40 '. Determine what kind of triangle it is from the size of its angles.
  • Find the
    triangle1 Find the third interior angle of the triangle ABC where: α = 48°, γ = 65°.
  • RWY
    SFO_map Calculate the opposite direction of the runway 13. Runways are named by a number between 01 and 36, which is generally one tenth of the azimuth of the runway's heading in degrees: a runway numbered 09 points east (90°), runway 18 is south (180°), runway 2
  • Length of the arc
    obluk What is the arc length of a circle k (S, r=68mm), which belongs to a central angle of 78°?