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madam [21]
3 years ago
12

ABC is an isoscles triangle. Angle A = 40°.

Mathematics
1 answer:
umka21 [38]3 years ago
8 0

Answer:

70 degrees

Step-by-step explanation:

total angle in a triangle is 180 degrees

180-40= 140

Angle b and c is total of 140 degrees

they are isosceles so their measurements would be same.

angle b and c is 140÷ 2 = 70

so angle b is 70 degrees

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A

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You'll need the attached formula.

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Step-by-step explanation:

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