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mario62 [17]
3 years ago
8

If AC =15 how long is ED? Help me :(

Mathematics
2 answers:
Kobotan [32]3 years ago
7 0

Answer:

7.5

Step-by-step explanation:

Using similar triangles.

noname [10]3 years ago
4 0

Answer:

ED=7.5

Step-by-step explanation:

ΔABC is similar to ΔDEB (they share ∠B, and ∠C=∠D and ∠A=∠E because corresponding angles), so their sides are in ratio:

ED/AC=BD/BC

We can see that BC is twice BD (marked), so we know BD/BC=0.5

ED/AC=BD/BC

ED/15=0.5

ED=7.5

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