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Delgadojacky0206
19.12.2020 •
Mathematics
The sides of a 30 60 90 triangle are 9 and 18.What is the third length of the triangle
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Ответ:
15.59 or 9√3
Step-by-step explanation:
We can use the Pythagorean Theorem to calculate the third side.
c² = a² + b² In a 30 60 90 Triangle, the hypotenuse is twice the length of the short leg of the right angle.
c is the hypotenuse. a is the short leg
18² = 9² + b²
324 = 81 + b² Subtract 81 from both sides.
324 - 81 = b² becomes b² = 243 Take the square root of both sides
b = 15.5884 . This can be rounded to 15.59 or 15.6 depending on significant digits or amount of precision required.
The proportions of the sides of the 30 60 90 triangle can also be used:
2² = 1² + b²
4 = 1 + b²
3 = b²
√3 = b
You can always multiply the length of the short leg by √3 to get the length of the side opposite the 60° angle
Ответ:
-10
Step-by-step explanation:
You add the -6x to both sides and get -3x+7=37 Then you subtract 7 from each side and get -3x=30 and divide each side by -3 and you get your answer or x=-10