Geometry and TrigonometryVery hardAngle formed by extending a side of an isosceles triangle
Geometry and Trigonometry practice question
In triangle KLM, KL = KM and angle L measures 40°. Side LM is extended beyond M to a point N. What is the measure, in degrees, of angle KMN?
Answer: 140
Angle KML equals angle L, 40°, so its supplement, angle KMN, is 140°.
Common wrong answers
- If you answered 40
- 40 is angle KML.
- If you answered 80
- 80 is the sum of the two base angles.
- If you answered 100
- 100 is angle K.
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