Question

I don't know what to do, she told she would tell us next week about our assignment, but it's due today, anyways, I need help. Idk if I just don't remember or whatever, anyways I need help.

Answer 1

One way you could do this is find the area of the black square then subtract from it the area of the triangle (between the black square and the blue squad) times 4.

Answer 2

Okay...

I'm not sure if I'm doing this right, but would that make it 400?

Answer 3

That sounds a bit too large.

Answer 4

The length of the sides of the square are 9 squares long, so you'd calculate the total area of the black square to be 9 times 9 = 81

Answer 5

YEah..


I just looked at it again.

So I would do..\[9\times9\times4\]

\[9 \times 9~obviousily = 81.~\And~81\times4=324\]

So 324 would be the correct answer?

Answer 6

That would be four black squares.

Answer 7

What were trying to do is find the area of the black square, which is 81, then subtract from that value, the area of the 4 triangles.

Answer 8

This will give us the area of the blue shaded square.

Answer 9

Conceptually this is what we're doing. Black square - the red regions (triangles) = area of the blue square

Answer 10

@Astrid1 Does that make sense?

Answer 11

Yeah, kind of. I'm still trying to figure out how to find the area of the triangles.

Answer 12

\[A_{t} = \frac{ 1 }{ 2 }bh\]
Area of a triangle is equal to 1/2 of the base multiplied by the height

Answer 13

The base is 1 and the height is 9.

Answer 14

OKay so my answer would be 4.5?



Ngl, I used google xd.

Answer 15

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Shadow
\[A_{t} = \frac{ 1 }{ 2 }bh\]
Area of a triangle is equal to 1/2 of the base multiplied by the height
\(\color{#0cbb34}{\text{End of Quote}}\)

\[A_{t} = \frac{ 1 }{ 2 }(1)(9) = \frac{ 1 }{ 2 } (9) = 4.5\]

It's not that bad :P

Now since we have the area of one triangle, we multiply that by four.

Answer 16

So it would be 18?

Answer 17

Yes. So now we have the area of the four triangles. What do we do next?

Answer 18

I don't know..😅😕

Answer 19

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Shadow
What were trying to do is find the area of the black square, which is 81, then subtract from that value, the area of the 4 triangles.

Answer 20

Remember the square. We can find the area of the smaller square if we subtract the area of the triangles from the bigger square.

Answer 21

So 81 minus 18?
o-o

Answer 22

Yes

Answer 23

Big square minus triangles equals little square

Answer 24

63?

Answer 25

Yeah you got this :p