Trapezoid 20873
In the trapezoid ABCD (AB II CD) is α = 57 °, γ = 4β. Calculate the size of all interior angles.
Correct answer:
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You need to know the following knowledge to solve this word math problem:
- geometry
- line
- algebra
- system of equations
- expression of a variable from the formula
- planimetrics
- trapezoid
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