How To Measure A Triangle With An Inner Angle?

To find the angles in a triangle, use the formulas transformed from the law of cosines: cos (alpha)= frac (b^2+c^2-a^2) (2bc) cos(α) = 2bcb2 + c2 − a2. The interior angles of a triangle add up to 180°. For example, 90° + 60° + 30° = 180°. If a line is tilted by 10°, 80° + 70° + 30° = 180°. To find any missing interior angle, add the two given angles and subtract from 180 degrees.

The three interior angles of a triangle are HOP, HPO, and PHO. The measure of angle ACB is 80 degrees. To find the measure of one interior angle, divide it by the number of sides n: (n – 2) × 180 ÷ n. The interior angles of a regular polygon are the three angles on the inside of a triangle, which always sum to 180 degrees. To find the measure of an interior angle of a regular polygon, use the formula for each angle = (n – 2) × 180 / n.