Triangle angles 1

The  exercise appears under the Geometry Math Mission. This exercise applies basic facts about triangles to find missing angles.

Types of Problems
There is one type of problem in this exercise:


 * 1) Find the measure of the missing angle: This problem provides a triangle with some angle measures and side measures provided. The student is asked to find a particular value that is missing and is labeled with a variable.Triang1-1.png

Strategies
Knowledge of a few triangle facts are encouraged to ensure success on this exercise.
 * 1) The sum of the angles in a triangle is 180 degrees.
 * 2) The sum of two non right angles in a right triangle are 90 degrees.
 * 3) An isosceles triangle has two congruent sides. These are across from two congruent base angles.
 * 4) If the measure of the vertex angle in a triangle is x, then the base angles are $$\frac{180-x}{2}$$.

Real-life Applications

 * 1) Finding angles in shapes is useful for art, architecture and urban planning.
 * 2) Missing angle measure is important in trigonometry which has far reaching important applications in many fields such as physics and astronomy.