Dynamic Geometry: Langley's Problem,
Isosceles Triangle, 20, 50, 60, 80 Degrees, Angle. HTML5 Animation for Mobile Devices. Get Started Now - Click the Play Button Below! to start the step-by-step solution.
In isosceles triangle ABC (where AB = BC), point E lies on AB and point D lies on BC. Given that angle B is 20 degrees, angle DAC is 60 degrees, and angle ACE is 50 degrees, find the measure of angle ADE.
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