Suppose an isosceles triangle ABC has A = 30° and b = c = 5. What is the length of a2?

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asked Jan 26, 2018 115k views

1 Answer

Bambax · Answer 1 · 2018-02-02T02:00:50+0000

You wanna use the Sine rule. So, a/sin30 = 5/sin75
You want to make a the subject, so you multiply both sides by sin30 so now you have a = 5sin30/sin75
If you square this number you get 6.7

Suppose an isosceles triangle ABC has A = 30° and b = c = 5. What is the length of a2?

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