Answer:
4. m∠a = 20°
5. m∠b = 160°
6. m∠c = 110°
Step-by-step explanation:
4. m∠a and m∠d are complementary angles.
m∠a + m∠d = 90°
m∠a + 70° = 90°
m∠a = 90° - 70°
m∠a = 20°
5. m∠a and m∠b are supplementary angles.
m∠a + m∠b = 180°
20° + m∠b = 180°
m∠b = 180° - 20°
m∠b = 160°
6. m∠d and m∠c are supplementary angles.
m∠d + m∠c = 180°
70° + m∠b = 180°
m∠b = 180° - 70°
m∠b = 110°
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Answer:
4. m∠a = 20°
5. m∠b = 160°
6. m∠c = 110°
Step-by-step explanation:
4. m∠a and m∠d are complementary angles.
m∠a + m∠d = 90°
m∠a + 70° = 90°
m∠a = 90° - 70°
m∠a = 20°
5. m∠a and m∠b are supplementary angles.
m∠a + m∠b = 180°
20° + m∠b = 180°
m∠b = 180° - 20°
m∠b = 160°
6. m∠d and m∠c are supplementary angles.
m∠d + m∠c = 180°
70° + m∠b = 180°
m∠b = 180° - 70°
m∠b = 110°