Original Target Problem
The problem we are training for
Rectangle ABCD has a right angle at B. AB = DC = 20. Point E lies on DC so that
DE = 3·EC. Diagonal AC and segment BE cross at point F. Find AF : FC.
Scroll down — by the time you reach Unit 10, you will be able to solve this yourself using nothing more than a right angle, a pair of parallel sides, and one similarity rule.
Scroll down — by the time you reach Unit 10, you will be able to solve this yourself using nothing more than a right angle, a pair of parallel sides, and one similarity rule.
📓 Wrong-Answer Notebook
Every question you missed or skipped, gathered here for a second look.
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