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Geometry Problem 1152: Triangle, Quadrilateral, Angle, 10, 20, 30 Degrees. Level: School, College, Mathematics Education

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The figure below shows a quadrilateral ABCD, angle ACB = 10 degrees, angle ADB = 20 degrees, angle BDC = 30 degrees, and angle BAD + angle ACD =145. Find angle BAC.
This entry contributed by Sumith Peiris, Moratuwa, Sri Lanka.
 
 

Geometry Problem 1152 Triangle, Quadrilateral, Angle, 10, 20, 30 Degrees


See also:
Triangles
Quadrilaterals
Angles

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