Triangle abc is similar to triangle def and has a ratio of similarity of 5: 2. if side ab measures 30 mm, how long is side de?

For similar triangles, we can relate them through ratio and proportion. The ratio of ΔABC to ΔDEF is 5/2. We equate this to the measure of AB to the measure of DE, which is 30/x. Calculate for x to find the length of DE.

5/2 = 30/x
5x = 60
x = 60/5
x = 12 mm

Thus, side DE has a length of 12 mm.

Idon’t exactly understand but i think dbc=rst