QUESTION IMAGE
Question
finding angle measures of a triangle given two angles of a similar triangle
find ( mangle f = 15^circ ) and ( mangle e = 95^circ ) as shown below.
assume the triangles are accurately drawn.
find ( mangle r ), ( mangle s ), and ( mangle t ).
Step1: Identificar triángulos semejantes
Los triángulos \( \triangle DEF \) y \( \triangle STR \) son semejantes, por lo que sus ángulos correspondientes son iguales. En \( \triangle DEF \), \( m\angle F = 15^\circ \), \( m\angle E = 95^\circ \), entonces \( m\angle D = 180^\circ - 15^\circ - 95^\circ = 70^\circ \) (ya que la suma de ángulos en un triángulo es \( 180^\circ \)).
Step2: Encontrar \( m\angle R \)
Como \( \angle R \) corresponde a \( \angle E \) (por semejanza), \( m\angle R = m\angle E = 95^\circ \).
Step3: Encontrar \( m\angle S \)
\( \angle S \) corresponde a \( \angle D \), así que \( m\angle S = m\angle D = 70^\circ \).
Step4: Encontrar \( m\angle T \)
\( \angle T \) corresponde a \( \angle F \), entonces \( m\angle T = m\angle F = 15^\circ \).
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\( m\angle R = 95^\circ \), \( m\angle S = 70^\circ \), \( m\angle T = 15^\circ \)