Examine the triangle at right. Each part is a separate problem. Homework Help ✎
If m∠D = 48º and m∠F = 117º, then what is m∠E?
Solve for x if m∠D = 4x + 2º, m∠F = 7x – 8º, and m∠E = 4x + 6º. Then calculate m∠D.
If m∠D = m∠F = m∠E, what type of triangle is ΔFED?
Review the Math Notes Box in this Lesson 7.1.4.
Use the Triangle Angle Sum Theorem: 48° + 117° + m∠E = 180°
Use the same method as part (a).
If all of the angles have equal measure, then all of the sides have equal measure.