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anonymous
 5 years ago
please help!!!
triangle ABC & triangle DEF,<A=<D,<b=<E,when BC =6.72cm,AB=4.8cm,CA=12cm,and FD=20cm. find the sum of :de+ef
anonymous
 5 years ago
please help!!! triangle ABC & triangle DEF,<A=<D,<b=<E,when BC =6.72cm,AB=4.8cm,CA=12cm,and FD=20cm. find the sum of :de+ef

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Two angles equal, so third angle equal so triangles similar (3 angles). DF/AC = 20/12 = 1.667 = DE/AB = EF/BC. The rest should be easy. A shorter way: AB + BC = 1.667 (DE + EF)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I DIDNT GOT????????????

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Do you mean you don't understand my solution? The two triangles ABC and DEF are similar, so the three corresponding sides are in the same ratio. AB/DE = BC/EF = AC/DF. But we are given DF = 20cm and AC = 12cm, so we can calculate the ratio as 20/12  1.667

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i dont either its trig there has got to be a formula for everything it cant be that simple and i have the answer but i cant get the work to look like it to get the answer the answer is 11.2 and 8

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0right no this is a case of 2 similar triangles with equal angles so no trig needed just set up the ratios

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.020/12 = DE/4.8 20/12 = EF/6.72
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