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  • ABC, AB = 5 cm, BC = 8 cm and CA = 7 cm. If D and E are respectively the mid-points of AB and BC, determine the length of DE.

\triangle ABC, AB = 5 cm, BC=8cm andCA = 7 cm. If D and E are respectively the mid-points of AB and BC, determine the length of DE.

Answers (1)

Given: AB = 5cm, BC = 8cm and CA = 7cm and D and E are the midpoints of AB and BC.
To Find: Length of DE

Using mid-point theorem DE\parallel AC
And  DE=\frac{1}{2}AC
DE=\frac{1}{2}\times 7
DE=\frac{7}{2}cm
DE=3.5cm
Hence answer is 3.5 cm.

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infoexpert26

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