MO Z7–I–6 2021
In triangle ABC, point D lies on the AC side and point E on the BC side. The sizes of the angles ABD, BAE, CAE, and CBD are 30°, 60°, 20°, and 30°, respectively. Find the size of the AED angle.
Correct answer:
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You need to know the following knowledge to solve this word math problem:
- geometry
- line
- similarity of triangles
- algebra
- equation
- expression of a variable from the formula
- planimetrics
- right triangle
- triangle
Units of physical quantities:
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