gabrielolivas59
01.07.2019 •
Mathematics
Line segment ef is shown on a coordinate grid: the line segment is rotated 180 degrees counterclockwise about the origin to form e'f'. which statement describes e'f'? a e'f' is perpendicular to ef.b e'f' and ef are equal in length.c e'f' is half the length of ef.d e'f' is greater than twice the length of ef.
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Ответ:
B. E'F' and EF are equal in length.
Step-by-step explanation:
A rotation is a kind of rigid transformation which produces the image of same shape and size after rotating it by some degrees .The rotation has two main properties:-
1. Rotations preserve size ( includes sides and angles).
2. Lines connecting the center of rotation to the pre-image and the corresponding point on the image have equal length.
Given : The line segment is rotated 180 degrees counterclockwise about the origin to form E'F'.
Then, E'F' and EF are equal in length. ( by property 1.)
Ответ:
The common ratio of the first G.P. series will be the cube root of the common ratio of the second G.P. series.
Step-by-step explanation:
Let us assume that the first series has first term a and the common ratio r and is given by
a, ar, ar², ar³, ......... up to infinite terms
It is given that the terms of the second series are a cube of the corresponding terms of the first series.
So, the second series is up to infinite terms.
So, it is clear that the second series is a G.P. series with first term a³ and common ratio r³.
Therefore, the common ratio of the first G.P. series will be the cube root of the common ratio of the second G.P. series. (Answer)