Walter used the iterative process to determine that √13  is between 3.61 and 3.62.

analyze walter’s estimation. is he correct? if not, what was his mistake?

yes, walter is correct.

no, 3.612  is less than 13.

no, both 3.612  and 3.622  are greater than 13.

no, both 3.612  and 3.622  are less than 13.

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.