Browse · MATH Print → jmc geometry junior Problem △ABC∼△DBE, BC=20 cm. How many centimeters long is DE? Express your answer as a decimal to the nearest tenth. Solution — click to reveal From our similarity, we have that: ACDEDE=BCBE=BCBE⋅AC=20 cm13 cm⋅12 cm=7.8 cm. Final answer 7.8 ← Previous problem Next problem →
