Question

∆85°∆55°∆5°∆25° find x and y​

Answer 1

Step-by-step explanation:

Correct option is

A

85

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In a △ABC, by angle sum property, sum of angles of a triangle is 180

∘

∴∠ABC+∠BCA+∠CAB=180

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Given : ∠A=∠CAB=55

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and ∠B=∠ABC=40

∘

.

∴55

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+40

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+∠BCA=180

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∴∠BCA=180

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−95

∘

=85

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.