<span>A) Joey used 10 congruent triangles to create a regular decagon.
What kind of triangles is he using?
He is using isosceles triangles. because the two sides (of each triangle) whose vertix is at the center of the decagon are congruent, while the third side, is different.
b)Joey used 10 congruent triangles to create a regular decagon.
Find the three angle measures of one of the triangles. Explain how you know.
The angle between the two congruent sides is equal to 360° divided by the number of triangles.
360° / 10 = 36.
The other two angles are congruent and must obey the rule of 180°.
2x + 36 = 180 => 2x = 180 - 36 = 144
x = 144 / 2 = 72°
Then two angles are 72° and the other is 36°.
c)Joey used 10 congruent triangles to create a regular decagon.
If the area of each triangle is 14.5 square inches, then what is the area of the regular decagon? Show all work.
The area of the decagon is ten times the area of a triangle.
Area of the decagon = 10 * 14.5 in^2 = 145 in^2.
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Answer:
The slope is -7
Step-by-step explanation:
The indicates the slope/gradient of a graph
Answer: Divide 93.7 by 2.7
Step-by-step explanation:
Explanation in progress:
Let’s say the the smudged number is x, for simplicity.
So, the equation will look like this:
x · 2.7 = 93.7
To get x, you will have to isolate it, meaning leave it alone and bring all the other numbers to the other side.
Since we used multiplication for x, we need to use the opposite of it, which is division, to get rid of the number next to the x.
The equation will now look like this:
=
Therefore, we will be using division to solve this problem, making the answer to be “divide 93.7 by 2.7”.
Hope this helps! :)
X = 18.8 bc that’s the only thing that makes sense and us lazy people don’t need to work things out