Geometry

Properties of Triangles

Triangles - Angle Sum

         

In the above triangle, the blue angle is 30 30^\circ and the green angle is 70 70 ^ \circ . What is the measure of the yellow angle (in degrees)?

In the above triangle, the blue angle is 30 30^\circ , the green angle is 80 80 ^ \circ , and the purple angle is 45 45 ^ \circ . What is the measure of the yellow angle?

In the above diagram, the purple angle at ZZ equals 144 \color{#69047E}{ 144}^\circ and the blue angle at YY equals 111 \color{#3D99F6} {111} ^ \circ . What is the measure of the green angle at XX?

Note: The diagram is not drawn to scale.

In the above diagram, CAD=30,ACD=80\color{#3D99F6} {\angle CAD=30^\circ}, \color{#69047E}{\angle ACD=80^\circ} and line BD\overline{BD} is a bisector of ADC\angle ADC. What is CBD\color{#20A900}{\angle CBD} in degrees?

In the above diagram, what is green angle \color{#20A900} {\text{green angle}} in degrees?

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