If the side opposite a 60-degree angle in a 30-60-90 right triangle is 7√3 cm

long, how long is the hypotenuse?(1 point)
Responses

28 cm
28 cm

14 cm
14 cm

73–√ cm
7 Start Root 3 End Root cm

7 cm

1 answer

In a 30-60-90 triangle, the ratios of the lengths of the sides opposite the angles are as follows:

  • The side opposite the 30-degree angle is \( x \).
  • The side opposite the 60-degree angle is \( x\sqrt{3} \).
  • The hypotenuse (opposite the 90-degree angle) is \( 2x \).

In your case, you mentioned that the side opposite the 60-degree angle is \( 7\sqrt{3} \) cm. According to the side ratios:

\[ x\sqrt{3} = 7\sqrt{3} \]

From this, we can deduce that:

\[ x = 7 \]

Now, we can find the length of the hypotenuse:

\[ \text{Hypotenuse} = 2x = 2(7) = 14 \text{ cm} \]

So, the hypotenuse is 14 cm.