3 years ago

One angle of an isosceles triangle measures 138°. Which other angles could be in that isosceles triangle?

Mathematics

1 answer:

BartSMP [9]3 years ago

3 0

Answer:

2 21 degree angles

Step-by-step explanation:

An isosoles triangle has two congruent angles and every triangle's sum of interior angles equals 180 degrees. 138*2>180, so the 138 degree angle cannot be congruent to any of the other angles. Therefore:

180=138+2x

42=2x

21 degrees=x

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