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a pennant is in the shape of an isosceles triangle. one leg of the tria…

Question

a pennant is in the shape of an isosceles triangle. one leg of the triangle is fastened to a stick so that the bottom leg of the triangle makes an 80° exterior angle with the stick. what is the measure of each remote interior angle? the measures of the remote interior angles are □. (simplify your answer. use a comma to separate answers as needed. do not include the degree symbol in your answer.)

Explanation:

Step1: Recordar la propiedad de ángulo exterior

El ángulo exterior de un triángulo es igual a la suma de los dos ángulos interiores no adyacentes (remotos). En un triángulo isósceles, dos ángulos internos son iguales.

Step2: Calcular los ángulos internos remotos

Dado que el ángulo exterior es 80°. Sea el ángulo interior remoto $x$. Como los dos ángulos interiores remotos son iguales en este caso (por la isosceles - idad), entonces $2x = 80$.
Dividir ambos lados de la ecuación $2x=80$ por 2: $x=\frac{80}{2}=40$.

Answer:

40