1.Solve the following sums: i)Three angles of a quadrilateral are 25° , 136° and 17° . Find the fourth angle.
ii) The angles of a quadrilateral are 4x° , 2x °, x° and 5x° . Find the value of x.
iii) Three angles of a quadrilateral are 2a° , 10a° and 19a°. Find an expression for
the fourth angle.

Step-by-step explanation:

i) the fourth angle is x=360-(25+136+17)

x=182

ii) 4x+2x+x+5x=360

12x=360

x=30

iii) an expression for the fourth angle can be 5a

they charge the same amount at 20 minutes.

step-by-step explanation:

d. corresponding side lengths in similar triangles are proportional in length.

step-by-step explanation: