In an isosceles triangle CDE with the base CE, the height CF is drawn, set the angle ECF, if the angle is D = 54 degrees.
| August 1, 2021 | education
Based on the properties of an isosceles triangle.
Height is both median and bisector.
CF-height means CFD-rectangular triangle.
The angle of the F-line is 90 degrees.
Angle D is equal to 54 degrees. by condition.
So the DCF angle is equal to.
180- (54 + 90) = 36 gr.
Since the height, it is also the bisector:
means angle DCF = angle ECF = 36 degrees.
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