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3 years ago

Does 7,20,21 form a right triangle

2 answers:

5 0

7,20,21 does form a right triangle because the right triangle having these side lengths is sometimes called the 3,4,5 triangle and 7,20,21 is a part of the divisors

AleksAgata [21]3 years ago

3 0

Answer:

Step-by-step explanation:

You need a 90 degree angle to form a right triangle, as well as two other angles with the sum of 90 to be equivalent to 180 degrees.

Hope this helps!

You might be interested in

which of the following is the result of using the remainder theorem to find F(-1) for the polynomial function F(x) = -x^3+6x^2-4

balandron [24]

Answer:

d). 22

Step-by-step explanation:

add the -1 for x then solve

7 0

3 years ago

The vertices of ∆ABC are A(2, 8), B(16, 2), and C(6, 2). what is the perimeter and area in square units

ad-work [718]

Check the picture below.

the triangle has that base and that height, recall that A = 1/2 bh.

now as for the perimeter, you can pretty much count the units off the grid for the segment CB, so let's just find the lengths of AC and AB,

$\bf ~~~~~~~~~~~~\textit{distance between 2 points}\\\\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&A&(~ 2 &,& 8~) 
% (c,d)
&C&(~ 6 &,& 2~)
\end{array}~~~ 
% distance value
d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2}
\\\\\\
AC=\sqrt{(6-2)^2+(2-8)^2}\implies AC=\sqrt{4^2+(-6)^2}
\\\\\\
AC=\sqrt{16+36}\implies AC=\sqrt{52}\implies AC=\sqrt{4\cdot 13}
\\\\\\
AC=\sqrt{2^2\cdot 13}\implies AC=2\sqrt{13}$

$\bf ~~~~~~~~~~~~\textit{distance between 2 points}\\\\
\begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&A&(~ 2 &,& 8~) 
% (c,d)
&B&(~ 16 &,& 2~)
\end{array}\\\\\\
AB=\sqrt{(16-2)^2+(2-8)^2}\implies AB=\sqrt{14^2+(-6)^2}
\\\\\\
AB=\sqrt{196+36}\implies AB=\sqrt{232}\implies AB=\sqrt{4\cdot 58}
\\\\\\
AB=\sqrt{2^2\cdot 58}\implies AB=2\sqrt{58}$

so, add AC + AB + CB, and that's the perimeter of the triangle.

8 0

3 years ago

Please help me with this one!!

Tema [17]

Answer:

$21 in^{2}$

Step-by-step explanation:

The square in the middle has a length and width of 3, so multiply. 9.

All of the triangles have a base of 3 and a height of 2. The area equation for triangles is

$A=bh\frac{1}{2}$

So base*height is 6. Divide that by 2 or multiply by 1/2.

You get 3. There are 4 triangles, so multiply that by 4. 12.

Add 12 and 9 together, and you get:

$21 in^{2}$

I hope this helps!

6 0

3 years ago

-5(5 – 2x) = -95 show work and all steps please

Lady bird [3.3K]

Answer:

x = -7

Step-by-step explanation:

See the photo attached.

4 0

3 years ago

Read 2 more answers

Someone please answer and explain!!!

emmainna [20.7K]

Hi there! The answer is B. $ 11,323.38

To find our answer we need to fill in the formula with the given data:

t = 5
P (the initial value) = $9000
I = 4.7% / 100 = 0.047 (since we have to change the percentage into a multiplier).

Now just fill in:
$a(5) = 9000 \times (1.047 ){}^{5} = 11323.375...$
Rounded, our answer is B. $11,323.38

5 0

4 years ago

Read 2 more answers

Does 7,20,21 ​form a right triangle

Does 7,20,21 form a right triangle