In this figure please see pictures

∠ h = 75°

Step-by-step explanation:

∠ e = ∠ a = 105° ( corresponding angles )

∠ h and ∠ e are adjacent angles and sum to 180°

∠ h + 105° = 180° ( subtract 105° from both sides )

∠ h = 75°

step-by-step explanation: h: (- 3, 6)

m: (1, - 2)

o: (7, 6)

r: (- 9, - 2)

midpoint of hm: (- 1, 2)

midpoint of or: (- 1, 2)

therefore, b is the midpoint of both diagonals bisect each other !

to prove the diagonals are perpendicular, show that the product of the slopes = - 1

135 is your answer

step-by-step explanation:

try 180 times three then divide that number by 4 (sides) to get your answer. im glad to : )