Eva is showing her work in simplifying (7.3 − 7.2) − 3.8 + 3.7. In which step did Eva make an error?
1 answer:
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Answer:
32.3 feet
Step-by-step explanation:
Let BC=32 feet
AC=60.5 feet
The angle between side BC and AC=45-25=20 degrees
We have to find the distance traveled by player to get to the ball.
Cosine law:
Using Cosine law
Hence, he travel 32.3 feet to get to the ball.
The perimeter is the sum of all sides of the triangle. Since the triangle is not straight you must use the distance formula which is basically the Pythagorean theorem but used coordinates to solve for the sides.
I like to just use the Pythagorean theorem instead of coordinates. If you draw right triangles on the one in the picture with hypotenuse as the unknown sides.
3^2 + 5^2 = (AB)^2
9 + 25 = 34
sqrt(34) = AB
1^2 + 2^2 = (AC)^2
1 + 4 = 5
sqrt(5) = AC
3^2 + 4^2 = (BC)^2
9 + 16 = 25
sqrt(25) = 5 = BC
add up sides
perimeter = sqrt(34) + sqrt(5) + 5
I like to just use the Pythagorean theorem instead of coordinates. If you draw right triangles on the one in the picture with hypotenuse as the unknown sides.
3^2 + 5^2 = (AB)^2
9 + 25 = 34
sqrt(34) = AB
1^2 + 2^2 = (AC)^2
1 + 4 = 5
sqrt(5) = AC
3^2 + 4^2 = (BC)^2
9 + 16 = 25
sqrt(25) = 5 = BC
add up sides
perimeter = sqrt(34) + sqrt(5) + 5