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slavikrds [6]
3 years ago
11

The perimeter of △CDE is 55 cm. A rhombus DMFN is inscribed in this triangle so that vertices M, F, and N lie on the sides CD ,

CE , and DE respectively. Find CD and DE if CF=8 cm and EF=12 cm.
Mathematics
2 answers:
tamaranim1 [39]3 years ago
8 0

Answer:

CD=20 cm and DE=15 cm. CD=20 cm and DE=15 cm.

Step-by-step explanation:

A rhombus DMFN is inscribed in such a way that it is inscribed in  triangle CDE with the vertices M, F, and N l on the sides CD , CE , and DE respectively.

Now, in rhombus, the parallel sides are always parallel, therefore

MF║DE, thus, \frac{CM}{MD}=\frac{CF}{EF} by the basic proportionality condition.

It is given that CF=8 cm and EF=12 cm, therefore, \frac{CM}{MD}=\frac{8}{12}.

That is CM=8 cm and MD=12 cm. Therefore, CD=CM+MD=8+12=20.

According to question, Perimeter of △CDE =55 cm

⇒CD+DE+CE=55

⇒20+DE+20=55

⇒DE=15 cm

Hence, CD=20 cm and DE=15 cm.

Dafna1 [17]3 years ago
8 0

Answer:

CD=14

DE=21

Step-by-step explanation:

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