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angoliabirtio
12.09.2019 •
Mathematics
How are the properties of reflection used to
transform a figure?
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Ответ:
The properties of reflection are used when we want to reflect a figure across a specific line, it can be across y-axis, x-axis, y = x or y = -x.
In either case, the result is a reflection, that is, those lines will work as a mirror, having the same shape and size but reflected across the line.
It's important to say that a reflection is a rigid transformation, which means the shape or size of the figure won't chance.
If we want to reflect across the y-axis, the transformation is:
Across the x-axis:![(x,y) \implies (x,-y)](/tpl/images/0228/4799/2adeb.png)
Across the line y = x:![(x,y) \implies (y,x)](/tpl/images/0228/4799/9968b.png)
Across the line y = -x:
.
Ответ:
5.0
Step-by-step explanation:
Using Pythagorean Theorem:
a² + b² = c²
where a =? b= 12 in and c = 13 in
a² + (12)² = (13)²
a² + 144 = 169
a² = 169 - 144
a² = 25
a = √25 = 5
∴ a = 5.0
Pythagoras Theorem is usually applied when finding one missing side of a right-angle triangle.