Length in units:
Use phytogoras theorem or measure it by a ruler if your using a graph paper
AB = 5.65 units
AC = 5.83 units
CB = 1.41 units
Perimeter =5.65 + 5.83 + 1.41 = 12.89 units
Area = 1/2 * 1.41 * 5.65 = 3.98units
Help. help. help. help.
1 answer:
You might be interested in
The <em><u>correct answer</u></em> is:
Explanation:
The Quadratic Formula is
,
where a, b and c are the coefficients of a quadratic equation written in standard form, or 0=ax²+bx+c.
This means that first, we need to make our equation equal 0.
We have
-2 = -x + x² - 4
To make this equal 0, we must cancel the -2. We do this by adding 2:
-2+2 = -x + x² - 4 + 2
0 = -x + x² - 2
Now we write this in standard form. This means the x² term must come first, then the x term, then the constant:
0 = x²-x-2
This makes a = 1, b = -1 and c = -2. We then plug this into the quadratic formula.
You can use the similarity approach of these two triangles CBD and CAE
as a result:
so:
? = 6x^2 / 10 = 0.6 x^2
and the fact of:
Back to:
? =0.6 x^2 = 0.6 * 10^2 = 0.6 * 100 = 60
A
Hope that helps
as a result:
so:
? = 6x^2 / 10 = 0.6 x^2
and the fact of:
"The segment connecting the midpoints of two sides of a triangle is parallel to the third side and equals its half length"
so:BD = 0.5 AE 10 = 0.5 * 2x >>> x= 10Back to:
? =0.6 x^2 = 0.6 * 10^2 = 0.6 * 100 = 60
A
Hope that helps