Asap with number correct answers pls! (random answers gets moderated)

jk um, all I can say is that lines equal to 180 which means if 120 is the exterior angles then you should be able to find the interior ones as well which might help you explain. you can also bring up the law that all interior angles of a triangle add up to 360 because...laws exist for a reason. other than that IDK

External angles are : ∠EAB  + ∠CBF  x ∠ACD

∠EAB = 180°- ∠BAC
∠CBF = 180°- ∠CBA
∠ACD = 180°- ∠ECB

Add up all external angles as well as their equivalent:

∠EAB  + ∠CBF  x ∠ACD = 540° - (∠BAC + ∠CBA + ∠ECB)

But (∠BAC + ∠CBA + ∠ECB) = 180° (sum of angles in a triangle), then

∠EAB  + ∠CBF  x ∠ACD = 540° - ( 180°)

∠EAB  + ∠CBF  x ∠ACD = 360°

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 )