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Alex787 [66]
3 years ago
7

A triangle has side lengths of 19 centimetres, 19 centimetres, and 20 centimetres. Is this triangle equilateral?​

Mathematics
1 answer:
Sedbober [7]3 years ago
6 0

Answer:

no a equilateral triangle has the same length sides all the way around

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Answer:

a = 139.1

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Step-by-step explanation:

A. Reference angle = 68°

Opp = a

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a = 139.1 (nearest tenth)

B. Reference angle = 68°

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Cos 68 = adj/hyp

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