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Mathematics, 08.02.2021 22:40 amcalfie

Triangle BAC was dilated from triangle BDE at a scale factor of 2. What proportion proves that cos∠D = cos∠A? Triangles BDE and BAC, in which angle B is a right angle, point D is between points B and A, and point E is between points B and C; BD measures 2 units, BE measures 3 units, and DE measures 3 and 61 hundredths units.

2/3.61 = 4/7.22

3/2 = 6/4

3/3.61 = 6/7.22

2/3 = 4/6

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Triangle BAC was dilated from triangle BDE at a scale factor of 2. What proportion proves that cos∠D...
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