This is a way from an app
Hope this attached file will help u.
To know if Diagonals are perpendicular we need to know two line's slope
If two lines are pependicular their slope m1×m2=-1
For if they are making rhombus two opposite equal sides so u need to know the distancebetween the points.
Answer:
z=40 degrees
Step-by-step explanation:
a triangle is 180 degrees
<ACB=50 (180-130=50)
50+90=140
180-140=40
12x=3y tell me if this is wrong
9pi/8 = 8pi/8 + pi/8 = pi + pi/8
12 + pi - 9pi/8 = 12 + pi - pi - pi/8