## anonymous one year ago ABC is a triangle in which ∠A = 60o, AB = 3 cm and AC = 4 cm. If BD is the perpendicular from B to the side AC, what is the length of BD?

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1. anonymous

|dw:1438408541758:dw|

2. rhr12

Do you have a picture for it?

3. anonymous

nope

4. rhr12

I can't see the picture

5. rhr12

6. anonymous

Triangle ABD is a 30-60-90 triangle where the hypotenuse AB = 3. Multiply the hypotenuse by $$\frac{ \sqrt 3 }{ 2 }$$ to get the side opposite the 60° angle, BD. A 30-60-90 triangle is included in the drawing for your future reference |dw:1438408834225:dw|

7. marigirl

|dw:1438415484265:dw|

8. arindameducationusc

use, sqrt(3)/2=perpendicular/ base and x^2+a^2=3^2 You will get the perpendicular which is the answer...

9. anonymous

3^2+4^2=3^2=5-9=4