Me
triangle abctriangle abc is rotated to form △a'b'c' .

the coordinates of point a are (1, 1) , the coordinates of point b are (3, 1) , and the coordinates of point c are (1, 4) .

which counter clockwise rotation around the origin results in the transformation of △abc to △a'b'c' ?

select from the drop down arrow to choose the correct rotation.

(a) rotation of 90

(b) rotation of 180

(c) rotation of 360

The answer is a rotation 90

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c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.