Which triangle is a 30°60°-90° triangle? 10
O
5/3
15
o
5/3
10
05
10./3
15
O
10
5/3

The first answer in the screenshot is correct. Sides 5, 10 and 5√3

Step-by-step explanation: In a 30°60°-90° triangle, the side opposite the 30° angle (shortest side) is half the length of the hypotenuse. So you have to choose one with 5 & 10. Use the Pythagorean theorem to calculate the remaining side  a² + b² = c²

5² + b² = 10²,   so b² = 100-25  √b²=√75  so √(25)(3)  

b= 5√3

irrational, cannot

step-by-step explanation:

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