With regard to similar triangles's question, P 104 14 is given in Qidong Ninth Grade Mathematics. - Training Enrollment Network

With regard to similar triangles's question, P 104 14 is given in Qidong Ninth Grade Mathematics.

Solution: ∫∠B =∠B, ∠BEC=∠BDA.

∴ △BEC∽△BDA

∴ BD:BE=BA:BC

∴ △BDE∽△BAC

The area ratio is 2: 18.

The similarity ratio is 1:3.

∴ AC=3DE=6

∴ Height on the side of AC = 2×△ Area of ABC ÷AC=6

Related articles

Primary school teaching and research activity plan

Which is better, BBK Dayuan or 3-year college entrance examination 2-year simulation?

Junior one math test paper

Has Li Lao Chinese Medicine Museum registered its trademark? What other categories can be registered?

What is the sine value in mathematics?

What does nature mean in mathematics?

Concepts and formulas in primary school, junior high school and senior high school mathematics textbooks?

How to Cultivate Students' Question Consciousness in Mathematics Teaching 05

Mathematical significance of half price

Teaching plan for the first lesson at the beginning of school