Geometry and TrigonometryHardBase angles of an isosceles triangle
Geometry and Trigonometry practice question
Two sides of a triangle have equal length, and the angle between them measures 36°. What is the measure, in degrees, of each of the other two angles?
Answer: 72
The other two angles are equal: (180 − 36)/2 = 72.
Common wrong answers
- If you answered 36
- 36 is the given angle.
- If you answered 54
- 54 uses 180 − 36 − 90.
- If you answered 144
- 144 is the total of the two equal angles.
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