What is the measure of a base angle of an isosceles triangle if the measure of the vertex angle is 42 and the two congruent side s each measure 21 units?
2 answers:
If vertex angle is 42, and the base angles are congruent, this is an isosceles triangle, they each measure: 180-42/2. They each measure 69 degrees. The length of sides don't matter.
Answer:
69 degrees
Step-by-step explanation:
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