1. Since we have <span>two sides (AC and AB) and the included angle (60°), we are going to use the law of cosines to find the length of BC:
</span>
<span>
We can conclude that the length of the side BC is </span>
.
2. To find the area of triangle ABC we are going to use Heron's formula:
where
is the area of the triangle
is the semi-perimeter of the triangle
But first, we are going to find the semi-perimeter of our triangle using the formula:
We can infer for our triangle and from our previous calculation that
,
, and
. Lets replace those values to find the semi-perimeter of our triangle:
Finally, we can use Heron's formula to find the area of our triangle:
We can conclude that the area of our triangle is
10.42 square units.
Answer:
-8
Step-by-step explanation:
3 <u>+</u> -4 - 7
3 - 4 - 7
-1 - 7
-8
Answer:
he will earn $66.88
Step-by-step explanation: yep your welcome
Answer:
Have an amazing night/day!
Step-by-step explanation:
14 i think ill edit if im wrong
Total mass of salt in the 2100 grams of solution = 15 + 0.05 * 210 = 25.5 grams
as a percent this is (25.5 * 100) / 210 = 12.14% Answer