Find the area of triangle ABC. Give your answer to 1 decimal place. Sine rule.

Mathematics

1 answer:

laiz [17]3 years ago

4 0

Answer:

Solution,

In ∆ ABC

< A + <B + < C = 180°

or, 72 + 59 + <C = 180°

or, 131 + <C = 180°

or, <C = 180 - 131

< C = 49

Area of ∆ABC = 1/2 ab sin C

= 1/2 * 12 * 7 * sin 49

= 42 * sin 49

= 31.7 ( approximately)

Hope this helps...

Good luck on your assignment...

You might be interested in

Which of the following forms of I.D. is not an acceptable form of I.D. for opening a savings account?

larisa86 [58]

Answer: [A]: "library card".
____________________________________
Explanation: One would need a valid, government-issued photo ID card (i.e. that has not expires).

Although SOME library cards include one's picture, library cards do not constitute "valid ID's" because they are not "government-issued" and would, theoretically, be easy to be made fraudulently (e.g. not have security-issued seals and features).

Even "school ID's"; or "college ID cards"; even if "current" (e.g. currently enrolled" with a photo ID) would not be considered "official" and would only be considered "secondary ID".
_____________________________________________

6 0

3 years ago

Read 2 more answers

Find the area of the circle with the given radius or diameter use pi equals 3.1 4 R is equal to six

marysya [2.9K]

<h2>Hello!</h2>

The answer is:

The area is equal to 113.04 units.

To find the area of the circle, we need to use the given information about the radius (6).

So, the area of a circle is given by the following formula:

$A=\pi *r^{2}$