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Alexeev081 [22]
3 years ago
6

a car travels 1.2 miles from point a to point b. the car then turns at point b and travels 1.8 miles to point c before heading b

ack to point a. the distance from point point c to point a is 1.6 miles. if the cars path is represented by a triangle what angle turn

Mathematics
2 answers:
wel3 years ago
4 0

<em>Since we are given with the three sides of the triangle and asked to determine the angle, we can use the cosine law.</em>

<em>                               b² = a² + c² - 2ac(cosB)</em>

<em>Substituting the known values,</em>

<em>                          (1.8)² = (2.4)² + (1.6)² - 2(2.4)(1.6)(cosB)</em>

<em>The value of B from the equation is 48.6°. </em>

fiasKO [112]3 years ago
3 0

Answer:

B = 60.6 degree

Step-by-step explanation:

Side AB, c = 1.2 miles

Side BC, a = 1.8 miles

Side CA, b = 1.6 miles

Use Cosine rule to find the angle B.

Cos B = \frac{a^{2}+c^{2}-b^{2}}{2ac}

Putting the values of a, b and c

Cos B = \frac{1.8^{2}+1.2^{2}-1.6^{2}}{2\times 1.8\times 1.2}

Cos B = \frac{3.24+1.44-2.56}{4.32}

Cos B = 0.491

B = 60.6 degree

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