In triangle xyz, m∠z > m∠x + m∠y. which must be true about △xyz?

m∠x + m∠z < 90°
m∠y > 90°
∠x and∠y are complementary
m∠x + m∠y < 90°

M∠Z > m∠X + m∠Y
m∠X + m∠Y + m∠Z = 180°
m∠X + m∠Y = 180°- m∠Z
m∠Z > 180° - m∠Z
2 m∠Z > 180°    /:2
m∠Z > 90°  ( A, B and C are not possible )

D ) m∠X + m∠Y < 90°

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )