Which statements are always true regarding the diagram? check all that apply. m3+ m 4 = 180° m2 + m 4+ m26 = 180° m2 + m 4 = m 25 m1+ m2 = 90° m4+ m6 = m22 m2 + m 6 = m 25

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

What is the result of the following division?

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.