In a
triangle ABC, BD is a median. If angle ABD = 15 degree and angle DBC = 30
degree, find the measure of the angle A.

*This entry contributed by Sumith Peiris, Moratuwa, Sri Lanka. Trigonometry is not allowed.
*

See also:

Poster of problem
1389.

Geometry Problems

Ten problems: 1411-1420

Visual Index

Open Problems

All Problems

Triangle

Midpoint

Median

Congruence

30 degree angle

Angles

View or Post a solution