9514 1404 393
Answer:
45.6°
Step-by-step explanation:
The attached result was found by typing "arccos(7/10) in degrees" into a web browser search box.
Your calculator can give you the same result. The inverse cosine function often shares a key with the cosine function. It is often marked as cos⁻¹. Be sure that the angle mode is set to degrees, not radians.
we know that
Translations of geometric figures in the coordinate plane can be determined by translating the x- and y-coordinates of points. The translation is an isometric transformation (not changes the size of the figure)
so
vertex -------->
<u>Find the rule in the x-coordinate</u>
x--------> x+2
<u>Find the rule in the y-coordinate</u>
y--------> y+1
<u>The translation rule is </u>
<u>Verify vertex B</u>
------->
------>
-------->
------> is ok
<u>Verify vertex C</u>
------->
------>
-------->
------> is ok
The three vertices have the same rule, therefore the triangles are congruent
<u>the answer is</u>
The translation rule is