Question

find the measures of all angles of parallelogram,if one angle is 20° less than thrice the smallest angle​

Answer 1

Step-by-step explanation:

let the smallest angle be X

so, one angle should be 20-3x

in parallelogram the opposite angle are same and all four angle measure 360

X+20-3x=360

2x=360/20

2x=18

X=9

o

two angles are 9 and other are 7

Answer 2

Answer:

Step-by-step explanation:

let the smallest angle be X

so, one angle should be 3x-20

in parallelogram the opposite angle are same and sum of all four angle measure 360

X+20-3x=180

4x = 200

x = 50

adjacent angle  = 3(50) - 20 = 150 - 20 = 130

since, the opposite angles are equal the other pair of angles is 130 and 50.

hope it helps you...