Write the equation of each circle. 1. Circle X centered at the origin with radius 10
2. Circle R with center R(-1, 8) and radius 5
3. Circle P with center P(-5,-5) and radius 2.5
4. Circle O centered at the origin that passes
through (9,-2)
5. Circle B with center B(0, -2) that passes
through (-6,0)

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.