Alana solved this problem: Reflect AABC across the x-axis to form AA'B'C'. Then dilate the image by a scale factor of 2 with the center of dilation at the
origin to form AA"B"C".
Explain and correct the mistakes shown in her work.

Can someone check my answer? you : )

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

The trigonometric ratios sine and secant are reciprocals of each other