Multiple Choice Question (MCQ)
In the triangle ACE , AE is parallel to BD , what is the approximate length of DE ?

×
2.33

×
2.67

×
3.33

×
3.67

×
6.67
In the triangle ACE , AE is parallel to BD , what is the approximate length of DE ?
2.33
2.67
3.33
3.67
6.67
Since the triangle BDC is similar to triangle AEC , their corresponding sides are proportional,
\dfrac{BD}{AE} = \dfrac{DC}{EC}
\dfrac{3}{5}=\dfrac{4}{EC}
\therefore EC = \dfrac{5}{3}\cdotp 4 \approx6.67
DE = ECDC = 6.674=2.67