Solved Math Problems

Real problems that students search for every day — worked out completely, step by step, with the reasoning explained. Each solution comes with a video walkthrough by Dr. E and a free practice worksheet. New problems added regularly.

📐 Geometry

Geometry 🎬 Video · 📄 Worksheet

Trapezoid ABCD: the bisectors of ∠A and ∠B intersect on side DC. BC = 9, AD = 4 — find AB.

One clever construction turns this into an isosceles triangle — and reveals two hidden facts along the way.

See the full solution →

Geometry Coming soon

Triangle ABC: AC = 3·CD, CF = 8 — find FD (angle bisector meets perpendicular bisector).

The next problem in the series — students are already searching for this one.

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How we choose these problems

These aren't random exercises. Each one is a problem that real students are actively searching for help with. Dr. E works the full solution on video, we publish every step with the reasoning — free, no sign-up, no paywall. Want more practice on a topic? Every solution links to a free printable worksheet.