Given
A triangle.
with vertices at (−2, 1) , (2, 1) , and (3, 4)
Find out the area of a triangle.
To proof
Formula

As given the vertices at (−2, 1) , (2, 1) , and (3, 4)
put in the above equation
we get
![= \frac{1}{2} [-2(1-4)+ 2 (4-1) + 3 ( 1-1) ]](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B1%7D%7B2%7D%20%5B-2%281-4%29%2B%202%20%284-1%29%20%2B%203%20%28%201-1%29%20%5D)
solving
![= \frac{1}{2} [6 + 6]](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B1%7D%7B2%7D%20%5B6%20%2B%206%5D)
thus
![=\frac{1}{2} [12]](https://tex.z-dn.net/?f=%3D%5Cfrac%7B1%7D%7B2%7D%20%5B12%5D)
area of the triangle is 6 units².
Hence proved
Answer:
$68
Step-by-step explanation:
First, find out what 15% of $80 is. 15% as a decimal is 0.15. Multiply 0.15 and 80 together.
0.15 x 80 = 12.
Now, subtract 12 from the original price, 80.
80 - 12 = 68.
Answer:
well I'm sure if this is entirely correct but i would say it would be 12
Step-by-step explanation:
Answer:
1. Matissa
2. Negative
Step-by-step explanation:
2.3^6
The 2 is called the matissa
10^-3=.010
Answer:
9-foot piece is better deal by $0.03 per foot
Step-by-step explanation:
2.80/8 = $0.35 per foot (for 8-foot piece)
2.88/9 = $0.32 per foot (for 9-foot piece)