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The hypotenuse of a 30° -60° -90° triangle is 13 cm. Find the area of the triangle in square centimeters.

 

I am confused by the negatives in the triangle, I'd appreciate any help.

 

Thank you so much!

 Feb 1, 2021
 #1
avatar+269 
+2

Those aren't negative signs. 

 

The problem says: 

The hypotenuse of a 30° 60° 90° triangle is 13 cm. Find the area of the triangle in square centimeters.

 Feb 1, 2021
 #2
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******

 

 

cool cool cool

.
 Feb 1, 2021
edited by CPhill  Feb 1, 2021
 #4
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Side   opp  the 60° angle =   hypotenuse  * ( sqrt 3/2)  =  6.5 sqrt 3= 11.258 cm

Guest Feb 1, 2021
 #3
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30-60-90 triangle   hyp = 13 cm

one leg is 13 sin 30 = =6.5 cm

other leg is 13 sin 60 = 11.258 cm

 

1/2 b h = area = 1/2* 6.5 * 11.258 = 36.58 cm2

 Feb 1, 2021

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